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// ==UserScript==
// @name           Dates, Times and Spellings
// @namespace      http://regionaltraffic.co.uk/
// @description    UK date format, 24-hour clock, Anglicised spellings, Metric units
// @include        *
// @exclude        http://www.bbc.co.uk/travelnews/*
// @exclude        https://www.hsbc.co.uk/*
// ==/UserScript==

// Last Updated: Tuesday 3rd May 2011

/*globals XPathResult*/

// Regular expression components
var SPACE = "[ \\t\\u00A0]*";
var SPACER = "(?:" + SPACE + "| and )";
var MONTHS = "(January|February|March|April|June|July|August|September|October|November|December|(?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sept|Sep|Oct|Nov|Dec)\\.?)(?=\\s|\\b|\\d)";
var DAYS = "(3[01]|[0-2][0-9]|[1-9])(?:st|nd|rd|th)?(?=\\b|[^\\d])";

var UNIT_PREFIX = "(\\(|[^\\w.,+\\-\\\\£$\\u20AC:]|^)";
var COEFFICIENT_REAL = "([-+]?(?:[\\d,]*\\d|[\\d,]*\\.\\d+)[\\u00BC\\u00BD\\u00BE]?(?: hundred| thousand| million| billion| trillion)?|one|an|a)([\\- \\t\\u00A0]?)";
var COEFFICIENT_INT  = "(\\+?[\\d,]*\\d)([\\- \\t\\u00A0]?)";

// Imperial distance units
var NAUTICAL_MILE = "nautical miles?|nmi";
var MILE = "miles?\\b|mi\\b";
var FURLONG = "furlongs?";
var CHAIN = "chains?";
var ROD = "rods?\\b|poles?\\b";
var FATHOM = "fathoms?";
var YARD = "yards?|yds?";
var FOOT = "(?:(?:survey )?foot\\b|feet)|ft|'(?!s)|\\u2032";
var INCH = "inches|inch|ins?\\b|\"s?(?=[\\s.,]|$)|\\u2033";

// Imperial mass units
var UK_LONG_TON = "(?:(?:UK )?long )?ton(?!ne)s?\\b";
var UK_HUNDRED_WEIGHT = "(?:UK )?(?:hundredweights?|cwt)";
var STONE = "stones|stone(?! curlew)|st\\b";
var POUND = "pounds?(?! prize)|lbs?";
var OUNCE = "ounces?|oz";

// Imperial area unit
var ACRE = "acres?";
var ROOD = "roods?";

// Imperial volume units
var US_FLUID_OUNCE = "US fluid ounces?|US fl oz";
var FLUID_OUNCE = "(?:Imperial |UK )?fluid ounces?|fl oz";
var US_PINT = "US pints?";
var PINT = "pints?|pt";
var QUART = "(?:US |Imperial )?quarts?\\b|qts?\\b";
var US_GALLON = "US gal(?:lon)?s?";
var GALLON = "(?:UK )?gal(?:lon)?s?";

// Imperial temperature unit
var FAHRENHEIT = "(?:degrees |\\u00B0)?Fahrenheit|\\u00B0?F\\b";

// Metric distance units
var KILOMETRE = "kilometres?|kilometers?|km";
var HECTOMETRE = "hectometres?|hectometers?|hm";
var DECAMETRE = "de[ck]ametres?|de[ck]ameters?|dam\\b";
var METRE = "metres?|meters?|m(?:\\b|(?=\\d))";
var DECIMETRE = "decimetres?|decimeters?|dm";
var CENTIMETRE = "centimetres?|centimeters?|cm";
var MILLIMETRE = "milimetres?|millimeters?|mm\\b";
var MICROMETRE = "micrometres?|micrometers?|\\u00B5m";
var NANOMETRE = "nanometres?|nanometers?|nm";

// Metric mass units
var TONNE = "tonnes?|t\\b";
var KILOGRAM = "kilograms?|kilos?\\b|kgs?";
var GRAM = "grams?\\b|g\\b";
var MILLIGRAM = "milligrams?|mg";

// Metric area unit
var HECTARE = "hectares?|ha\\b";

// Metric volume units
var LITRE = "litres?|liters?\\b|l\\b";
var HECTOLITRE = "hectolitres?|hectoliters?|hl";
var MILLILITRE = "millilitres?|milliliters?|ml";

// Metric temperature unit
var CELSIUS = "(?:degrees |\\u00B0)?(?:Centigrade|Celsius|C\\b(?!#| file))";

// Percentage
var PERCENT = "(?:per cent|percent|pc)\\b";

// Unit matching expressions
var IMPERIAL = "(" + NAUTICAL_MILE + "|" + MILE + "|" + FATHOM + "|" + CHAIN + "|" + ROD + "|" + YARD + "|" + FOOT + "|" + INCH + "|" + UK_LONG_TON + "|" + UK_HUNDRED_WEIGHT + "|" + STONE + "|" + POUND + "|" + OUNCE + "|" + ACRE + "|" + ROOD + "|" + US_FLUID_OUNCE + "|" + FLUID_OUNCE + "|" + US_PINT + "|" + PINT + "|" + QUART + "|" + US_GALLON + "|" + GALLON + "|" + FAHRENHEIT + ")";
var METRIC = "(" + KILOMETRE + "|" + HECTOMETRE + "|" + DECAMETRE + "|" + METRE + "|" + DECIMETRE + "|" + CENTIMETRE + "|" + MILLIMETRE + "|" + MICROMETRE + "|" + NANOMETRE + "|" + TONNE + "|" + KILOGRAM + "|" + GRAM + "|" + MILLIGRAM + "|" + HECTARE + "|" + LITRE + "|" + HECTOLITRE + "|" + MILLILITRE + "|" + CELSIUS + "|" + PERCENT + ")";

// Single units (dimensioned)
var IMPERIAL_UNIT = COEFFICIENT_REAL + "((?:square|sq|cube|cubic)" + SPACE + "?)?" + IMPERIAL + "(\\^?[23\\u00B2\\u00B3]|" + SPACE + "squared|" + SPACE + "cubed)?";
var METRIC_UNIT   = COEFFICIENT_REAL + "((?:square|sq|cube|cubic)" + SPACE + "?)?" + METRIC   + "(\\^?[23\\u00B2\\u00B3]|" + SPACE + "squared|" + SPACE + "cubed)?";

// Paired single units (dimensioned)
var IMPERIAL_METRIC   = UNIT_PREFIX + IMPERIAL_UNIT + SPACE + "(?:[/;]" + SPACE + "|[([])" + METRIC_UNIT   + "[)\\]]?";
var METRIC_IMPERIAL   = UNIT_PREFIX + METRIC_UNIT   + SPACE + "(?:[/;]" + SPACE + "|[([])" + IMPERIAL_UNIT + "[)\\]]?";
var IMPERIAL_IMPERIAL = UNIT_PREFIX + IMPERIAL_UNIT + SPACE + "(?:[/;]" + SPACE + "|[([])" + IMPERIAL_UNIT + "[)\\]]?";

// Multi-unit imperial expressions
var IMPERIAL_LENGTHS = COEFFICIENT_INT + "(?:(" + NAUTICAL_MILE + ")" + SPACER + COEFFICIENT_INT + ")?(?:(" + MILE + ")(?:" + SPACER + COEFFICIENT_INT + ")?)?(?:(" + CHAIN + ")(?:" + SPACER + COEFFICIENT_INT + ")?)?(?:(" + ROD + ")(?:" + SPACER + COEFFICIENT_INT + ")?)?(?:(" + FATHOM + ")(?:" + SPACER + COEFFICIENT_INT + ")?)?(?:(" + YARD + ")(?:" + SPACER + COEFFICIENT_INT + ")?)?(?:(" + FOOT + ")(?:" + SPACER + COEFFICIENT_INT + ")?)?(" + INCH + ")?";
var IMPERIAL_MASSES  = COEFFICIENT_INT + "(?:(" + UK_LONG_TON + ")" + SPACER + COEFFICIENT_INT + ")?(?:(" + UK_HUNDRED_WEIGHT + ")(?:" + SPACER + COEFFICIENT_INT + ")?)?(?:(" + STONE + ")(?:" + SPACER + COEFFICIENT_INT + ")?)?(?:(" + POUND + ")(?:" + SPACER + COEFFICIENT_INT + ")?)?(" + OUNCE + ")?";

// Multi-unit metric expressions
var METRIC_LENGTHS = COEFFICIENT_INT + "(?:(" + KILOMETRE + ")" + SPACE + COEFFICIENT_INT + ")?(?:(" + HECTOMETRE + ")(?:" + SPACE + COEFFICIENT_INT + ")?)?(?:(" + DECAMETRE + ")(?:" + SPACE + COEFFICIENT_INT + ")?)?(?:(" + METRE + ")(?:" + SPACE + COEFFICIENT_INT + ")?)?(?:(" + DECIMETRE + ")(?:" + SPACE + COEFFICIENT_INT + ")?)?(?:(" + CENTIMETRE + ")(?:" + SPACE + COEFFICIENT_INT + ")?)?(?:(" + MILLIMETRE + ")(?:" + SPACE + COEFFICIENT_INT + ")?)?(?:(" + MICROMETRE + ")(?:" + SPACE + COEFFICIENT_INT + ")?)?(" + NANOMETRE + ")?";
var METRIC_MASSES  = COEFFICIENT_INT + "(?:(" + TONNE + ")" + SPACE + COEFFICIENT_INT + ")?(?:(" + KILOGRAM + ")(?:" + SPACE + COEFFICIENT_INT + ")?)?(?:(" + GRAM + ")(?:" + SPACE + COEFFICIENT_INT + ")?)?(" + MILLIGRAM + ")?";

// Paired multi-unit expressions
var IMPERIAL_METRIC_LENGTHS = UNIT_PREFIX + IMPERIAL_LENGTHS + SPACE + "([/;]" + SPACE + "|[([])" + METRIC_LENGTHS   + "[)\\]]?";
var IMPERIAL_METRIC_MASSES  = UNIT_PREFIX + IMPERIAL_MASSES  + SPACE + "([/;]" + SPACE + "|[([])" + METRIC_MASSES	 + "[)\\]]?";
var METRIC_IMPERIAL_LENGTHS = UNIT_PREFIX + METRIC_LENGTHS   + SPACE + "([/;]" + SPACE + "|[([])" + IMPERIAL_LENGTHS + "[)\\]]?";
var METRIC_IMPERIAL_MASSES  = UNIT_PREFIX + METRIC_MASSES    + SPACE + "([/;]" + SPACE + "|[([])" + IMPERIAL_MASSES  + "[)\\]]?";

// Number Word components
var HYPHEN = "[\\-\\s]";
var UNIT = "(?:one|two|three|four|five|six|seven|eight|nine)";
var TEEN = "(?:ten|eleven|twelve|thirteen|fourteen|fifteen|sixteen|seventeen|eighteen|nineteen)";
var TEN = "(?:twenty|thirty|fourty|forty|fifty|sixty|seventy|eighty|ninety)(?:" + HYPHEN + UNIT + ")?";
var UNITS = "(?:" + TEN + "|" + TEEN + "|" + UNIT + ")";

var UNIT_LOOKAHEAD = "(?=[\\- ](nautical mile|nmi|mile|mi\\b|furlong|chain|rod|poles|fathom|foot|feet|ft|'|\\u2032|inch|\"|\\u2033|ton\\b|hundredweight|cwt|stone|st\\b|pound|lb|ounce|oz|acre|rood|us fluid ounce|us fl oz|fluid ounce|fl oz|us pint|pint|pt|quarts?\\b|qts?\\b|us gal|uk gal|degrees|\\u00B0|F\\b|kilomet|km|hectomet|hm|de[ck]amet|dam\\b|metre|meter|m\\b|decimet|dm|millimet|mm\\b|micromet|\\u00B5m|nanomet|nm|tonne|kilogram|kg|gram|g\\b|milligram|mg|hectare|ha\\b|litre|liter|hectolit|hl|millilit|ml|degrees C|\\u00B0C|per cent|percent))(?: per cent| percent)?";

var SEPARATOR = ",?(?:\\s|\\sand\\s)";
var HUNDRED = "(?:" + UNITS + HYPHEN + "hundred(?:" + SEPARATOR + UNITS + ")?)";
var THOUSAND = "(?:" + HUNDRED + "|" + UNITS + ")" + HYPHEN + "thousand(?:" + SEPARATOR + "(?:" + HUNDRED + "|" + UNITS + "))?";
var MILLION = "(?:" + THOUSAND + "|" + HUNDRED + "|" + UNITS + ")" + HYPHEN + "million(?:" + SEPARATOR + "(?:" + THOUSAND + "|" + HUNDRED + "|" + UNITS + "))?";
var BILLION = "(?:" + MILLION + "|" + THOUSAND + "|" + HUNDRED + "|" + UNITS + ")" + HYPHEN + "billion(?:" + SEPARATOR + "(?:" + MILLION + "|" + THOUSAND + "|" + HUNDRED + "|" + UNITS + "))?";
var TRILLION = "(?:" + BILLION + "|" + MILLION + "|" + THOUSAND + "|" + HUNDRED + "|" + UNITS + ")" + HYPHEN + "trillion(?:" + SEPARATOR + "(?:" + BILLION + "|" + MILLION + "|" + THOUSAND + "|" + HUNDRED + "|" + UNITS + "))?";

// Regular expressions
var reUSdate = new RegExp("([\\b:]?" + DAYS + SPACE + ")?" + MONTHS + SPACE + DAYS + "(," + SPACE + "(?=[12]\\d{3}))?(?!:\\d|\\d:|\\d\\d\\d?\\b)", "gi");
var reDayMonth = new RegExp("\\b" + DAYS + SPACE + MONTHS, "gi");
var reISO = /([12]\d{3})([\-\/._])(1[012]|0[1-9])\2(3[01]|[0-2][0-9]|[1-9])/g;
var reUSnumeric = /(1[012]|0?[1-9])([\-\/._])(3[01]|2[0-9]|1[3-9])\2([12]\d{3})/g;
var reTwelveHour = /\b([012]?[0-9])(?:[:\.]([0-5][0-9]))?(?:[:\.]([0-5][0-9]))?\s?([ap])\.?m(?:\b|\.)/gi;
var reURL = /\b(?:https?:\/\/|(?!\/)www\.)[\w\.\/?=%#\-~,:&+]+\b[=&#\/]?/;
var reLowerCaseI = /\bi\b/g;
var reBBCtime = /([01]\d|2[0-3])([0-5]\d) ?(GMT|BST)/g;

// Metrification regular expressions
var reImperialMetricLengths = new RegExp(IMPERIAL_METRIC_LENGTHS, "gi");
var reImperialMetricMasses = new RegExp(IMPERIAL_METRIC_MASSES, "gi");
var reMetricImperialLengths = new RegExp(METRIC_IMPERIAL_LENGTHS, "gi");
var reMetricImperialMasses = new RegExp(METRIC_IMPERIAL_MASSES, "gi");
var reImperialMetric = new RegExp(IMPERIAL_METRIC, "gi");
var reMetricImperial = new RegExp(METRIC_IMPERIAL, "gi");
var reImperialImperial = new RegExp(IMPERIAL_IMPERIAL, "gi");
var reImperialLengths = new RegExp(UNIT_PREFIX + IMPERIAL_LENGTHS, "gi");
var reImperialMasses = new RegExp(UNIT_PREFIX + IMPERIAL_MASSES, "gi");
var reMetricLengths = new RegExp(UNIT_PREFIX + METRIC_LENGTHS, "gi");
var reMetricMasses = new RegExp(UNIT_PREFIX + METRIC_MASSES, "gi");
var reImperial = new RegExp(UNIT_PREFIX + IMPERIAL_UNIT, "gi");
var reMetric = new RegExp(UNIT_PREFIX + METRIC_UNIT, "gi");
var reTrim = /^[\s]+|[\s]+$/g;
var reStrip = /[\s]+/g;
var reProperCase = /^(.)|\s(.)/g;
var reUnitSeparator = /[\/(]/;

// Quote string parsing
var DOUBLE_QUOTE_CHARS = '["\u02BA\u201C\u201D\u201F\u2033\u2036\u275D\u275E\u301D\u301E\uFF02]';
var SINGLE_QUOTE_CHARS = "['\u02B9\u02BC\u2018\u2019\u201B\u2032\u2035\u275B\u275C\uFF07]";

// Number word regular expressions
var reTrillion = new RegExp("\\b" + TRILLION + UNIT_LOOKAHEAD + "\\b", "gi");
var reBillion = new RegExp("\\b" + BILLION + UNIT_LOOKAHEAD + "\\b", "gi");
var reMillion = new RegExp("\\b" + MILLION + UNIT_LOOKAHEAD + "\\b", "gi");
var reThousand = new RegExp("\\b" + THOUSAND + UNIT_LOOKAHEAD + "\\b", "gi");
var reHundred = new RegExp("\\b" + HUNDRED + UNIT_LOOKAHEAD + "\\b", "gi");
var reUnits = new RegExp("\\b" + UNITS + UNIT_LOOKAHEAD + "(?!-)\\b", "gi");

// Anglicising
var saUStoUK = 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a","foriegn","foreign","forthe","for the","forwrd","forward","forwrds","forwards","foudn","found","foward","forward","fowards","forwards","freind","friend","freindly","friendly","freinds","friends","frmo","from","fromthe","from the","furneral","funeral","fwe","few","garantee","guarantee","gaurd","guard","gemeral","general","gerat","great","geting","getting","gettin","getting","gievn","given","giveing","giving","gloabl","global","goign","going","gonig","going","govenment","government","goverment","government","gruop","group","gruops","groups","grwo","grow","guidlines","guidelines","hadbeen","had been","hadn;t","hadn't","haev","have","hapen","happen","hapened","happened","hapening","happening","hapens","happens","happend","happened","hasbeen","has been","hasn;t","hasn't","hasnt","hasn't","havebeen","have been","haveing","having","haven;t","haven't","hda","had","he;ll","he'll","hearign","hearing","helpfull","helpful","herat","heart","here;s","here's","hesaid","he said","hewas","he was","hge","he","hismelf","himself","hlep","help","hsa","has","hsi","his","hte","the","htere","there","htese","these","htey","they","hting","thing","htink","think","htis","this","hvae","have","hvaing","having","hwich","which","i\"m","i'm","i;d","i'd","i;ll","i'll","idae","idea","idaes","ideas","identofy","identify","ihs","his","imediate","immediate","imediatly","immediately","immediatly","immediately","importent","important","importnat","important","impossable","impossible","improvemnt","improvement","improvment","improvement","includ","include","indecate","indicate","indenpendence","independence","indenpendent","independent","indepedent","independent","independance","independence","independant","independent","influance","influence","infomation","information","informatoin","information","inital","initial","instaleld","installed","insted","instead","insurence","insurance","inteh","in the","interum","interim","inthe","in the","inwhich","in which","isn;t","isn't","isthe","is the","it;ll","it'll","it;s","it's","itis","it is","ititial","initial","itnerest","interest","itnerested","interested","itneresting","interesting","itnerests","interests","itwas","it was","iwll","will","iwth","with","jsut","just","jugment","judgment","knowldge","knowledge","knowlege","knowledge","knwo","know","knwon","known","knwos","knows","konw","know","konwn","known","konws","knows","labratory","laboratory","lastyear","last year","learnign","learning","lenght","length","let;s","let's","levle","level","libary","library","librarry","library","librery","library","liek","like","liekd","liked","lieutenent","lieutenant","liev","live","likly","likely","lisense","license","littel","little","litttle","little","liuke","like","liveing","living","loev","love","lonly","lonely","lookign","looking","maintenence","maintenance","makeing","making","managment","management","mantain","maintain","marraige","marriage","memeber","member","merchent","merchant","mesage","message","mesages","messages","mispell","misspell","mispelling","misspelling","mispellings","misspellings","mkae","make","mkaes","makes","mkaing","making","moeny","money","morgage","mortgage","mroe","more","mysefl","myself","myu","my","naive","naïve","necassarily","necessarily","necassary","necessary","neccessarily","necessarily","neccessary","necessary","necesarily","necessarily","necesary","necessary","negotiaing","negotiating","nkow","know","nothign","nothing","nver","never","nwe","new","nwo","now","obediant","obedient","ocasion","occasion","occassion","occasion","occured","occurred","occurence","occurrence","occurrance","occurrence","ocur","occur","oeprator","operator","ofits","of its","ofthe","of the","oging","going","ohter","other","omre","more","oneof","one of","onepoint","one point","onthe","on the","onyl","only","oppasite","opposite","opperation","operation","oppertunity","opportunity","opposate","opposite","opposible","opposable","opposit","opposite","oppotunities","opportunities","oppotunity","opportunity","orginization","organization","orginized","organized","otehr","other","otu","out","outof","out of","overthe","over the","owrk","work","owuld","would","oxident","oxidant","papaer","paper","parliment","parliament","partof","part of","paymetn","payment","paymetns","payments","pciture","picture","peice","piece","peices","pieces","peolpe","people","peopel","people","percentof","percent of","percentto","percent to","performence","performance","perhasp","perhaps","perhpas","perhaps","permanant","permanent","perminent","permanent","personalyl","personally","pleasent","pleasant","poeple","people","porblem","problem","porblems","problems","porvide","provide","possable","possible","postition","position","potentialy","potentially","pregnent","pregnant","presance","presence","probelm","problem","probelms","problems","prominant","prominent","protege","protégé","protoge","protégé","psoition","position","ptogress","progress","puting","putting","pwoer","power","quater","quarter","quaters","quarters","quesion","question","quesions","questions","questioms","questions","questiosn","questions","questoin","question","quetion","question","quetions","questions","realyl","really","reccomend","recommend","reccommend","recommend","receieve","receive","recieve","receive","recieved","received","recieving","receiving","recomend","recommend","recomendation","recommendation","recomendations","recommendations","recomended","recommended","reconize","recognize","recrod","record","religous","religious","reluctent","reluctant","remeber","remember","reommend","recommend","representativs","representatives","representives","representatives","represetned","represented","represnt","represent","reserach","research","resollution","resolution","resorces","resources","respomd","respond","respomse","response","responce","response","responsability","responsibility","responsable","responsible","responsibile","responsible","responsiblity","responsibility","restaraunt","restaurant","restuarant","restaurant","reult","result","reveiw","review","reveiwing","reviewing","rumers","rumors","rwite","write","rythm","rhythm","saidhe","said he","saidit","said it","saidthat","said that","saidthe","said the","scedule","schedule","sceduled","scheduled","seance","séance","secratary","secretary","sectino","section","seh","she","selectoin","selection","sentance","sentence","separeate","separate","seperate","separate","sercumstances","circumstances","shcool","school","she;ll","she'll","shesaid","she said","shineing","shining","shiped","shipped","shoudl","should","shoudln't","shouldn't","shouldent","shouldn't","shouldn;t","shouldn't","shouldnt","shouldn't","showinf","showing","signifacnt","significant","simalar","similar","similiar","similar","simpyl","simply","sincerly","sincerely","sitll","still","smae","same","smoe","some","soem","some","sohw","show","soical","social","somethign","something","someting","something","somewaht","somewhat","somthing","something","somtimes","sometimes","soudn","sound","soudns","sounds","speach","speech","specificaly","specifically","specificalyl","specifically","statment","statement","statments","statements","stnad","stand","stopry","story","stoyr","story","stpo","stop","strentgh","strength","stroy","story","struggel","struggle","strugle","struggle","studnet","student","successfull","successful","successfuly","successfully","successfulyl","successfully","sucess","success","sucessfull","successful","sufficiant","sufficient","suposed","supposed","suppossed","supposed","suprise","surprise","suprised","surprised","swiming","swimming","tahn","than","taht","that","talekd","talked","talkign","talking","tath","that","tecnical","technical","teh","the","tehy","they","termoil","turmoil","tghe","the","tghis","this","thansk","thanks","thats","that's","thatthe","that the","themself","themselves","themselfs","themselves","thenew","the new","theri","their","thesame","the same","thetwo","the two","they;l","they'll","they;ll","they'll","they;r","they're","they;re","they're","they;v","they've","they;ve","they've","theyll","they'll","theyve","they've","thgat","that","thge","the","thier","their","thigsn","things","thisyear","this year","thna","than","thne","then","thnig","thing","thnigs","things","threatend","threatened","thsi","this","thsoe","those","thta","that","tihs","this","timne","time","tiogether","together","tje","the","tjhe","the","tkae","take","tkaes","takes","tkaing","taking","tlaking","talking","todya","today","togehter","together","tomorow","tomorrow","tongiht","tonight","tonihgt","tonight","totaly","totally","totalyl","totally","tothe","to the","towrad","toward","traditionalyl","traditionally","transfered","transferred","truely","truly","truley","truly","tryed","tried","tthe","the","tyhat","that","tyhe","the","udnerstand","understand","understnad","understand","unitedstates","United States","unliek","unlike","unpleasently","unpleasantly","untilll","until","useing","using","usualyl","usually","veyr","very","virtualyl","virtually","vis-a-vis","vis-à-vis","vrey","very","vulnerible","vulnerable","waht","what","warrent","warrant","wasnt","wasn't","watn","want","we;d","we'd","we;ll","we'll","we;re","we're","we;ve","we've","wehn","when","wern't","weren't","werre","were","what;s","what's","whcih","which","where;s","where's","wherre","where","whic","which","whihc","which","who;s","who's","who;ve","who've","whta","what","wief","wife","wierd","weird","wihch","which","wiht","with","willbe","will be","windoes","windows","witha","with a","withe","with","withthe","with the","wiull","will","wnat","want","wnated","wanted","wnats","wants","wo'nt","won't","woh","who","wohle","whole","wokr","work","won;t","won't","woudl","would","woudln't","wouldn't","wouldbe","would be","wouldn;t","wouldn't","wouldnt","wouldn't","wriet","write","writting","writing","wrod","word","wroet","wrote","wroking","working","wtih","with","wuould","would","wya","way","yera","year","yeras","years","yersa","years","yoiu","you","you;d","you'd","you;re","you're","youare","you are","youve","you've","ytou","you","yhe","the","yuo","you","yuor","your","youre","you're","1 comments","1 comment"];
var oaRegexs = [];

// Metrification aliasing/calculation arrays
var saUnitAlias = [];
var raUnitFactors = [];

// Number words lookup arrays
var iaWordNumber = [];
var iaWordFactor = [];

// Regex replace change flag
var m_bChangeMade = false;


// Proper case string prototype
String.prototype.toProperCase = function()
{
	return this.toLowerCase().replace(reProperCase, function($1)
	{
		return $1.toUpperCase();
	});
};


// String trimming prototype
String.prototype.trim = function()
{
	return this.replace(reTrim, "");
};


// String stripping prototype
String.prototype.strip = function()
{
	return this.replace(reStrip, "");
};


// Takes a number and returns the ordinalised form
var saOrdinals = ["th", "st", "nd", "rd"];
function ordinalise(iNumber, sMonth)
{
	var sOrdinal = "";
	iNumber = parseInt(iNumber, 10);
	if (sMonth.substr(sMonth.length - 1) != ".")
	{
		if ((sMonth.length > 3) || (sMonth.toLowerCase() == "may"))
		{
			var iOrdinal = 0;
			var iHundredUnit = iNumber % 100;
			if ((iHundredUnit < 11) || (iHundredUnit > 13))
			{
				iOrdinal = iNumber % 10;
				if (iOrdinal > 3)
				{
					iOrdinal = 0;
				}
			}
			sOrdinal = saOrdinals[iOrdinal];
		}
	}
	return iNumber + sOrdinal;
}


// Log changes made
var sChanged = "";
function logChange(vMatch, sTo)
{
	return;
	var sFrom = String((typeof(vMatch) == "object") ? vMatch[0] : vMatch);
	if (sFrom.replace(/ /g, "\u00A0") != String(sTo).replace(/ /g, "\u00A0"))
	{
		var sLine = "\n" + sFrom + " > " + sTo;
		if (sChanged.indexOf(sLine) == -1)
		{
			sChanged += "\n" + sFrom + " > " + sTo;
		}
	}
}


// US date to English (May 04 to 4th May)
function cbUSdate(sMatch, sPrefixOuter, sDayPrefix, sMonth, sDaySuffix, sComma)
{
	var sDate;
	if (sPrefixOuter && (sPrefixOuter.substr(0, 1) != ":"))
	{
		sDate = sMatch;
	}
	else
	{
		sPrefixOuter = sPrefixOuter || "";
		var sDay = ordinalise(sDaySuffix, sMonth);
		sMonth = sMonth.toProperCase().replace(".", "");
		var sSufix = ((sComma == ", " || sComma == ",") ? " " : "");

		sDate = sPrefixOuter + sDay + "\u00A0" + sMonth + sSufix;
		logChange(sMatch, sDate);
		m_bChangeMade = true;
	}
	return sDate;
}


// Ordinalise and capitalise (03 jAN to 3rd Jan)
function cbDayMonth(sMatch, sDay, sMonth)
{
	var sLocal;
	if (sMonth == "may")
	{
		sLocal = sMatch;
	}
	else
	{	
		sLocal = ordinalise(sDay, sMonth) + "\u00A0" + sMonth.toProperCase();
		logChange(sMatch, sLocal);
		m_bChangeMade = true;
	}
	return sLocal;
}


// ISO date to English (2008-06-28 to 28-06-2008)
function cbISO(sMatch, sYear, sSeparator, sMonth, sDay)
{
	var sLocal = (sDay.length == 1 ? "0" : "") + sDay + sSeparator + sMonth + sSeparator + sYear;
	logChange(sMatch, sLocal);
	m_bChangeMade = true;
	return sLocal;
}


// US separated date to English (4/13/2008 to 13/04/2008)
function cbUSnumeric(sMatch, sMonth, sSeparator, sDay, sYear)
{
	var sLocal = sDay + sSeparator + (sMonth.length == 1 ? "0" : "") + sMonth + sSeparator + sYear;
	logChange(sMatch, sLocal);
	m_bChangeMade = true;
	return sLocal;
}


// Twelve hour to 24-hour clock (4pm to 16:00)
function cbTwelveHour(sMatch, sHours, sMinutes, sSeconds, sZone)
{
	var iHours = (/p/i.test(sZone) ? 12 : 0) + parseInt(sHours, 10) % 12;
	sHours = (iHours < 10 ? "0" + iHours : String(iHours));
	
	var iMinutes = (sMinutes ? parseInt(sMinutes, 10) : 0);
	sMinutes = (iMinutes < 10 ? "0" + iMinutes : String(iMinutes));
	
	var sLocal = sHours + ":" + sMinutes;
	
	var iSeconds = (sSeconds ? parseInt(sSeconds, 10) : 0);
	if (iSeconds)
	{
		sLocal += ":" + (iSeconds < 10 ? "0" + iSeconds : String(iSeconds));
	}
	
	logChange(sMatch, sLocal);
	m_bChangeMade = true;
	
	return sLocal;
}


// BBC hhnn BST|GMT time zone formatting improvement
function cbBBCtime(sMatch, sHours, sMinutes, sTimeZone)
{
	m_bChangeMade = true;
	return sHours + ":" + sMinutes + " " + sTimeZone;
}


// Scoped for use by anglicise() and cbAnglicise()
var m_iRegex;


// Anglicisation callback
function cbAnglicise(sMatch)
{
	var sEnglish = saUStoUK[m_iRegex * 2 + 1];
	
	if (sMatch.charAt(1).match(/[A-Z]/))
	{
		// Uppercase
		sEnglish = sEnglish.toUpperCase();
	}
	else if (sMatch.match(/^[A-Z]/) || sEnglish.substring(0, 2) == "i'")
	{
		// Propercase
		sEnglish = sEnglish.charAt(0).toUpperCase() + sEnglish.substr(1);
	}
	
	//logChange(sMatch, sEnglish);
	m_bChangeMade = true;
	
	return sEnglish;
}


// Initialise metric unification
function metrificationInit()
{
	// Imperial to metric unit factors
	raUnitFactors.foot3 = [28316846.6,   "mm3"];
	raUnitFactors.inch3 = [   16387.064, "mm3"];
	
	raUnitFactors.mile2 = [2589988110336,	 "mm2"];
	raUnitFactors.acre  = [   4046856420,	 "mm2"];
	raUnitFactors.rood  = [   1011714105.6,  "mm2"];
	raUnitFactors.yard2 = [       836127.36, "mm2"];
	raUnitFactors.foot2 = [        92903.04, "mm2"];
	raUnitFactors.inch2 = [          645.16, "mm2"];
	
	raUnitFactors["nautical mile"]	= [1852000,     "mm"];
	raUnitFactors.mile				= [1609344,     "mm"];
	raUnitFactors.furlong			= [ 201168,     "mm"];
	raUnitFactors.chain				= [  20116.8,   "mm"];
	raUnitFactors.rod				= [   5029.2,   "mm"];
	raUnitFactors.fathom			= [   1828.8,   "mm"];
	raUnitFactors.yard				= [    914.4,   "mm"];
	raUnitFactors.foot				= [    304.8,   "mm"];
	raUnitFactors.link				= [    201.168, "mm"];
	raUnitFactors.inch				= [     25.4,   "mm"];
	
	raUnitFactors.gallon			= [4546.09188,  "ml"];
	raUnitFactors["us gallon"]		= [3785.41178,  "ml"];
	raUnitFactors.quart				= [1136.52297,  "ml"];
	raUnitFactors["us quart"]		= [ 946.352946, "ml"];
	raUnitFactors.pint				= [ 568.261485, "ml"];
	raUnitFactors["us pint"]		= [ 473.176473, "ml"];
	raUnitFactors["fluid ounce"]	= [  28.4130742,"ml"];
	raUnitFactors["us fluid ounce"] = [  29.5735296,"ml"];
	
	raUnitFactors.ton			= [907184740,	  "mg"];
	raUnitFactors.hundredweight = [ 50802345.44,  "mg"];
	raUnitFactors.stone			= [  6350293.18,  "mg"];
	raUnitFactors.pound			= [   453592.37,  "mg"];
	raUnitFactors.ounce			= [    28349.5231,"mg"];
	
	// Metric to base unit factors
	raUnitFactors.kilometre3  = [ 1000000000000000000, "mm3"];
	raUnitFactors.hectometre3 = [    1000000000000000, "mm3"];
	raUnitFactors.decametre3  = [       1000000000000, "mm3"];
	raUnitFactors.metre3	  = [          1000000000, "mm3"];
	raUnitFactors.decimetre3  = [             1000000, "mm3"];
	raUnitFactors.centimetre3 = [                1000, "mm3"];
	raUnitFactors.millimetre3 = [                   1, "mm3"];
	raUnitFactors.micrometre3 = [         0.000000001, "mm3"];
	raUnitFactors.nanometre3  = [0.000000000000000001, "mm3"];
	
	raUnitFactors.kilometre  = [ 1000000000000, "mm2"];
	raUnitFactors.hectometre = [   10000000000, "mm2"];
	raUnitFactors.hectare    = [   10000000000, "mm2"];
	raUnitFactors.decametre  = [     100000000, "mm2"];
	raUnitFactors.metre		 = [       1000000, "mm2"];
	raUnitFactors.decimetre  = [         10000, "mm2"];
	raUnitFactors.centimetre = [           100, "mm2"];
	raUnitFactors.millimetre = [             1, "mm2"];
	raUnitFactors.micrometre = [      0.000001, "mm2"];
	raUnitFactors.nanometre  = [0.000000000001, "mm2"];
	
	raUnitFactors.kilometre  = [ 1000000, "mm"];
	raUnitFactors.hectometre = [  100000, "mm"];
	raUnitFactors.decametre  = [   10000, "mm"];
	raUnitFactors.metre		 = [    1000, "mm"];
	raUnitFactors.decimetre  = [     100, "mm"];
	raUnitFactors.centimetre = [      10, "mm"];
	raUnitFactors.millimetre = [       1, "mm"];
	raUnitFactors.micrometre = [   0.001, "mm"];
	raUnitFactors.nanometre  = [0.000001, "mm"];
	
	raUnitFactors.tonne		= [1000000000, "mg"];
	raUnitFactors.kilogram	= [   1000000, "mg"];
	raUnitFactors.gram		= [      1000, "mg"];
	raUnitFactors.milligram = [         1, "mg"];
	
	raUnitFactors.hectolitre = [100000, "ml"];
	raUnitFactors.decalitre  = [ 10000, "ml"];
	raUnitFactors.litre		 = [  1000, "ml"];
	raUnitFactors.decilitre  = [   100, "ml"];
	raUnitFactors.millilitre = [     1, "ml"];
	
	raUnitFactors.celsius = [1, "c"];
	
	raUnitFactors.percent = [0.01, "pc"];
	
	// Imperial unit aliasing
	saUnitAlias["nautical mile"] = ["nautical miles", "nmi"];
	saUnitAlias.mile = ["miles", "mi"];
	saUnitAlias.furlong = ["furlongs"];
	saUnitAlias.chain = ["chains"];
	saUnitAlias.rod = ["rods", "poles", "pole"];
	saUnitAlias.fathom = ["fathoms"];
	saUnitAlias.yard = ["yards", "yd", "yds"];
	saUnitAlias.foot = ["survey foot", "survey feet", "feet", "ft", "'", "\u2032"];
	saUnitAlias.link = ["links"];
	saUnitAlias.inch = ["inches", "\"", "\"s", "in", "ins", "\u2033", "\u2033s"];
	
	saUnitAlias.acre = ["acres"];
	saUnitAlias.rood = ["roods"];
	
	saUnitAlias["fluid ounce"] = ["fl oz", "imperial fluid ounce", "uk fluid ounce"];
	saUnitAlias["us fluid ounce"] = ["us fl oz"];
	saUnitAlias["us pint"] = ["us pt", "us pts"];
	saUnitAlias.pint = ["pints", "pt", "pts"];
	saUnitAlias["us quart"] = ["us qt", "us qts"];
	saUnitAlias.quart = ["quarts", "qt", "qts", "imperial quarts", "imperial quart", "imperial qt", "imperial qts"];
	saUnitAlias["us gallon"] = ["us gallons", "us gal", "us gals"];
	saUnitAlias.gallon = ["gallons", "gals", "imperial gallon", "imperial gallons", "imperial gal", "imperial gals", "uk gallon", "uk gallons", "uk gal", "uk gals"];
	
	saUnitAlias.ton = ["uk long ton", "uk long tons", "long ton", "long tons", "tons"];
	saUnitAlias.hundredweight = ["hundredweights", "cwts", "cwt"];
	saUnitAlias.stone = ["stones", "st"];
	saUnitAlias.pound = ["pounds", "lbs", "lb"];
	saUnitAlias.ounce = ["ounces", "oz"];

	saUnitAlias.fahrenheit = ["degrees fahrenheit", "f"];
	
	// Metric unit aliasing
	saUnitAlias.kilometre = ["kilometres", "Kilometers", "kilometer", "km"];
	saUnitAlias.hectometre = ["hectometres", "hectometers", "hectometer", "hm"];
	saUnitAlias.decametre = ["decametres", "dekametres", "dekametre", "dekameters", "dekameter", "decameters", "decameter", "dam"];
	saUnitAlias.metre = ["metres", "meters", "meter", "m"];
	saUnitAlias.decimetre = ["decimetres", "decimeters", "decimeter", "dm"];
	saUnitAlias.centimetre = ["centimetres", "centimeters", "centimeter", "cm"];
	saUnitAlias.millimetre = ["millimetres", "millimeters", "millimeter", "mm"];
	saUnitAlias.micrometre = ["micrometres", "micrometers", "micrometer", "\u00B5m"];
	saUnitAlias.nanometre = ["nanometres", "nanometers", "nanometer", "nm"];
	
	saUnitAlias.hectare = ["hectares", "ha"];
	
	saUnitAlias.litre = ["litres", "liter", "liters", "l"];
	saUnitAlias.hectolitre = ["hectolitres", "hectoliters", "hectoliter"];
	saUnitAlias.millilitre = ["millilitres", "milliliters", "milliliter"];
	
	saUnitAlias.tonne = ["tonnes", "t"];
	saUnitAlias.kilogram = ["kilograms", "kilos", "kilo", "kgs", "kg"];
	saUnitAlias.gram = ["grams", "g"];
	saUnitAlias.milligram = ["milligrams", "mg"];
	
	saUnitAlias.celsius = ["degrees centigrade", "degrees celcius", "degrees c", "\u00B0centigrade", "\u00B0celsius", "\u00B0c", "c"];
	saUnitAlias.percent = ["per cent", "pc"];
	
	// Unit alias lookup mapping
	for (var sIndex in saUnitAlias)
	{
		if (typeof(saUnitAlias[sIndex]) == "object")
		{
			for (var iAlias = 0; iAlias < saUnitAlias[sIndex].length; iAlias++)
			{
				saUnitAlias[saUnitAlias[sIndex][iAlias]] = sIndex;
			}
		}
	}
}


// Numeric words lookup initialisation
function numberWordInit()
{
	iaWordNumber.one = 1;
	iaWordNumber.two = 2;
	iaWordNumber.three = 3;
	iaWordNumber.four = 4;
	iaWordNumber.five = 5;
	iaWordNumber.six = 6;
	iaWordNumber.seven = 7;
	iaWordNumber.eight = 8;
	iaWordNumber.nine = 9;
	iaWordNumber.ten = 10;
	iaWordNumber.eleven = 11;
	iaWordNumber.twelve = 12;
	iaWordNumber.thirteen = 13;
	iaWordNumber.fourteen = 14;
	iaWordNumber.fifteen = 15;
	iaWordNumber.sixteen = 16;
	iaWordNumber.seventeen = 17;
	iaWordNumber.eighteen = 18;
	iaWordNumber.nineteen = 19;
	iaWordNumber.twenty = 20;
	iaWordNumber.thirty = 30;
	iaWordNumber.forty = 40;
	iaWordNumber.fourty = 40; // Common typo
	iaWordNumber.fifty = 50;
	iaWordNumber.sixty = 60;
	iaWordNumber.seventy = 70;
	iaWordNumber.eighty = 80;
	iaWordNumber.ninety = 90;

	iaWordFactor.hundred = 100;
	iaWordFactor.thousand = 1000;
	iaWordFactor.million = 1000000;
	iaWordFactor.billion = 1000000000;
	iaWordFactor.trillion = 1000000000000;
}


// Tests for unit dimension
function getDimension(sDimension1, sDimension2)
{
	var bSquared = false;
	var bCubed = false;
	
	// Dimension prefix
	if (sDimension1)
	{
		sDimension1 = sDimension1.trim();
		bSquared = (sDimension1 == "square" || sDimension1 == "sq");
		bCubed = (sDimension1 == "cube" || sDimension1 == "cubic");
	}

	// Dimension suffix
	if (sDimension2)
	{
		sDimension2 = sDimension2.trim();
		bSquared = bSquared || (sDimension2 == "2" || sDimension2 == "\u00B2" || sDimension2 == "^2" || sDimension2 == "squared");
		bCubed = bCubed || (sDimension2 == "3" || sDimension2 == "\u00B3" || sDimension2 == "^3" || sDimension2 == "cubed");
	}
	
	return (bSquared ? 2 : (bCubed ? 3 : 1));
}


// Unit metrification
function getMetric(oMatch, sCoefficient, sGap, sUnit, sDimension1, sDimension2)
{
	var oReturn;
	
	// Process word-based magnitude
	var iMagnitude = 1;
	sCoefficient = sCoefficient.replace(/ (hundred|thousand|million|billion|trillion)$/i, function(sMatch, sFactor)
	{
		iMagnitude = iaWordFactor[sFactor.toLowerCase()];
		if (iMagnitude)
		{
			return "E" + String(iMagnitude).substr(1);
		}
		else
		{
			return sMatch;
		}
	});
	
	// Clean up coefficient
	sCoefficient = sCoefficient.replace(/[+,]/g, "");
	sCoefficient = sCoefficient.replace(/\u00BC$/, ".25");
	sCoefficient = sCoefficient.replace(/\u00BD$/, ".5");
	sCoefficient = sCoefficient.replace(/\u00BE$/, ".75");
	var iDotPos = sCoefficient.indexOf(".");
	if (iDotPos != -1)
	{
		// Cater for mangnitude decimal shift
		var iEpos = sCoefficient.indexOf("E", iDotPos + 1);
		if (iEpos != -1)
		{
			var iShift = sCoefficient.length - iEpos - 1;
			sCoefficient = sCoefficient.substring(0, iEpos);
			sCoefficient = sCoefficient.substring(0, iDotPos) + sCoefficient.substr(iDotPos + 1);
			iDotPos += iShift;
			if (iDotPos <= sCoefficient.length)
			{
				// Decimal remains
				sCoefficient = sCoefficient.substring(0, iDotPos) + "." + sCoefficient.substr(iDotPos);
			}
			else
			{
				// Decimal shifted out
				sCoefficient += String(Math.pow(10, (iDotPos - sCoefficient.length))).substr(1);
			}
		}
		
		// Strip beyond a further decimal point inclusively
		iDotPos = sCoefficient.indexOf(".");
		var iDotPos2 = sCoefficient.indexOf(".", iDotPos + 1);
		if (iDotPos2 != -1)
		{
			sCoefficient = sCoefficient.substring(0, iDotPos2);
		}
	}
	else
	{
		sCoefficient = sCoefficient.replace(/E/, "");
	}
	if (sCoefficient.match(/one/i))
	{
		sCoefficient = "1";
	}
	var rCoefficient = parseFloat(sCoefficient);
	if (!isNaN(rCoefficient))
	{
		// Get unit dimension
		var iDimension = getDimension(sDimension1, sDimension2);

		// Nautical mile determination
		if (sUnit == "NM")
		{
			sUnit = "nautical mile";
		}

		// Assess unit
		var sCanonicalUnit = sUnit.toLowerCase();
		var bProcess = (sUnit != "f"); // Upper case Fahrenheit unit only
		bProcess = bProcess && (sUnit != "ST"); // Exclude postcode fragments
		bProcess = bProcess && !(sCanonicalUnit == "in" && sGap); // Exclude "in" as word
		bProcess = bProcess && !(sUnit == "st" && !sGap && (rCoefficient % 2 == 1)); // Exclude "1st"-like words
		bProcess = bProcess && (sUnit != "St"); // Exclude street mismatch
		bProcess = bProcess && !(sCanonicalUnit == "dm" && sUnit != "dm"); // Exclude Dm from "3DMark"
		bProcess = bProcess && !(sUnit == "'" && sGap); // Exclude gap for foot symbol
		bProcess = bProcess && (sUnit != "M"); // Exclude Millions mistaken as metres
		bProcess = bProcess && (sUnit != "T"); // Tonne only as 't'
		bProcess = bProcess && (sUnit != "G"); // Gram only as 'g'
		bProcess = bProcess && !((sUnit == "'" || sUnit == "\u2032") && oMatch.input.substr(oMatch.index - 1, 1) == "\u00B0");
		bProcess = bProcess && !((sUnit == "\"" || sUnit == "\u2033") && (oMatch.input.substr(oMatch.index - 15, 15).indexOf("\u00B0") != -1));
		bProcess = bProcess && (sUnit != "c"); // Centigrade only as 'C'
		bProcess = bProcess && !(sCanonicalUnit == "pc" && sUnit != "pc"); // Percent 'pc' only in lowercase
		bProcess = bProcess && (sUnit != "Nm"); // Except Newton-metres
		bProcess = bProcess && (sUnit != "L"); // Litre must be lower case 'l'
		bProcess = bProcess && (sUnit != "FT"); // ft must be lower case
		bProcess = bProcess && (sUnit != "Mi"); // 'Mi' not accepted form of mile
		
		if (bProcess)
		{
			// Test for alias unit name
			var vAliasLookup = saUnitAlias[sCanonicalUnit];
			if (typeof(vAliasLookup) == "string")
			{
				// Substitute for canonical name
				sCanonicalUnit = vAliasLookup;
			}
			
			// Perform conversion
			var rConverted = null;
			var sBaseUnit, rFactor, rPrecision;
			if (sCanonicalUnit == "fahrenheit")
			{
				// Fahrenheit to Celsius
				rFactor = 5/9;
				rConverted = (rCoefficient - 32) * rFactor;
				sBaseUnit = "c";
			}
			else
			{
				// Get conversion factor and target unit
				var sUnitCode = (iDimension > 1 ? sCanonicalUnit + iDimension : sCanonicalUnit);
				var aUnitFactor = raUnitFactors[sUnitCode];
				if (aUnitFactor)
				{
					rFactor = raUnitFactors[sUnitCode][0];
					sBaseUnit = raUnitFactors[sUnitCode][1];
					
					// Perform raw conversion
					rConverted = rCoefficient * rFactor;
				}
			}

			if (rConverted !== null)
			{
				// Determine original precision in terms of converted unit
				var iTrailingZeroes = 0;
				if (sCoefficient == Math.floor(rCoefficient))
				{
					// Whole number, so range of 1 unless trailing zeroes
					var oPrefixMatch = String(rCoefficient).match(/0+$/);
					if (oPrefixMatch)
					{
						iTrailingZeroes = oPrefixMatch[0].length;
						if (iTrailingZeroes == 1)
						{
							// Treat 40 as 2 significant figures, 100 as 1 s.f.
							iTrailingZeroes = 0;
						}
					}
				}
				else
				{
					// Get decimal places
					var iDecimalPlaces = sCoefficient.length - sCoefficient.indexOf(".") - 1;
					iTrailingZeroes = -iDecimalPlaces;
				}
				rPrecision = rFactor * Math.pow(10, iTrailingZeroes) / 2;
				
				// Return metric object
				oReturn = {rCoefficient:rConverted, 
						   sSourceUnit:sCanonicalUnit, 
						   sUnit:sBaseUnit, 
						   rPrecision:rPrecision};
			}
		}
	}
	return oReturn;
}


// Formats a number to the given number of significant figures
function formatSigFigs(rNumber, iSigFigs)
{
	var sFormatted;
	if (iSigFigs > 0)
	{
		sFormatted = rNumber.toPrecision(iSigFigs);
		var iExpPos = sFormatted.indexOf("e");
		if (iExpPos != -1)
		{
			var bNegative = (sFormatted.substr(0, 1) == "-");
			if (bNegative)
			{
				sFormatted = sFormatted.substr(1);
			}
			var iExponent = parseInt(sFormatted.substr(iExpPos + 1), 10);
			sFormatted = sFormatted.substr(0, iExpPos);
			var iDotPos = sFormatted.indexOf(".");
			if (iDotPos != -1)
			{
				if (iExponent > 0)
				{
					iExponent -= sFormatted.length - iDotPos - 1;
					sFormatted = sFormatted.replace(".", "");
				}
				else
				{
					iExponent += iDotPos;
					sFormatted = "0." + sFormatted.replace(".", "");
				}
			}
			for (var iZeroes = 0; iZeroes < Math.abs(iExponent); iZeroes++)
			{
				sFormatted += "0";
			}
			if (bNegative)
			{
				sFormatted = "-" + sFormatted;
			}
		}
	}
	return sFormatted;
}


// Formats a metric quantity into a suitable string representation
function formatMetric(oMetric)
{
	// Scale result sensibly
	var sUnit = oMetric.sUnit;
	var rCoefficient = oMetric.rCoefficient;
	var rPrecision = oMetric.rPrecision;
	var rScaleFactor = 1;
	
	switch (sUnit)
	{
		// mm, cm, m, km
		case "mm":
		case "mm2":
		case "mm3":
		
			// Convert to suitably scaled unit
			var iDimension = (sUnit == "mm2" ? 2 : (sUnit == "mm3" ? 3 : 1));
			if (rCoefficient > 0 && rCoefficient < 0.001)
			{
				// mm to nm
				rScaleFactor = Math.pow(1000000, iDimension);
				sUnit = "n" + sUnit.substr(1);
			}
			else if (rCoefficient > 0 && rCoefficient < 1)
			{
				// mm to µm
				rScaleFactor = Math.pow(1000, iDimension);
				sUnit = "\u00B5" + sUnit.substr(1);
			}
			else if (rCoefficient >= 10)
			{
				if (rCoefficient < Math.pow(1000, iDimension))
				{
					// mm to cm 999mm - 99.9cm
					rScaleFactor = Math.pow(10, -iDimension);
					sUnit = "c" + sUnit.substr(1);
				}
				else if (rCoefficient < Math.pow(1000000, iDimension))
				{
					// mm2 to hectare
					if ((iDimension == 2) && (rCoefficient >= 10000000000))
					{
						rScaleFactor = Math.pow(10, -10);
						sUnit = "ha";
					}
					else
					{
						// mm to m
						rScaleFactor = Math.pow(1000, -iDimension);
						sUnit = sUnit.substr(1);
					}
				}
				else
				{
					// mm to km
					rScaleFactor = Math.pow(1000000, -iDimension);
					sUnit = "k" + sUnit.substr(1);
				}
			}
			
			// Superscript area and volume dimensions
			sUnit = sUnit.replace(/2$/, "\u00B2");
			sUnit = sUnit.replace(/3$/, "\u00B3");
			break;

		// ml, l
		case "ml":
		
			// Format volume
			if (rCoefficient >= 1000)
			{
				rScaleFactor = 0.001;
				sUnit = "litre";
			}
			break;

		// mg, g, kg, t
		case "mg":
		
			// Format mass
			if (rCoefficient >= 1000)
			{
				if (rCoefficient < 1000000)
				{
					// mg to g
					rScaleFactor = 0.001;
					sUnit = "g";
				}
				else if (rCoefficient < 1000000000)
				{
					// mg to kg
					rScaleFactor = 0.000001;
					sUnit = "kg";
				}
				else
				{
					// mg to t
					rScaleFactor = 0.000000001;
					sUnit = "tonne";
				}
			}
			break;

		// Celsius
		case "c":
			// Celsius
			sUnit = "\u00B0C";
			break;
			
		// Percentage
		case "pc":
			// Percent
			rScaleFactor = 100;
			sUnit = "%";
			break;
			
		default:
			alert("Unexpected unit: " + sUnit);
	}
	
	// Update coefficient and precision
	rCoefficient *= rScaleFactor;
	rPrecision *= rScaleFactor;
	
	// Format to final unit and precision
	var sFormatted;
	var sRange = formatSigFigs(rPrecision * 2, 15);
	
	var rDisplayRange = parseFloat(Number(sRange.replace(/^([0.]*)\d([\d.]*)$/, function(sMatch, sPrefix, sSuffix)
	{
		return sPrefix + "1" + sSuffix.replace(/[^.]/g, "0");
	})).toFixed(13));
	
	var sDisplayRange = String(rDisplayRange);
	if (rDisplayRange < 1)
	{
		// Decimal places
		var iExponentPos = sDisplayRange.indexOf("e-");
		if (iExponentPos != -1)
		{
			sDisplayRange = sDisplayRange.substring(0, iExponentPos);
		}
		var iDecimalPlaces = sDisplayRange.length - sDisplayRange.indexOf(".") - 1;
		sFormatted = rCoefficient.toFixed(iDecimalPlaces);
	}
	else
	{
		// Significant figures
		rCoefficient = Math.round(rCoefficient);
		var iSigFigs = Math.max(String(rCoefficient).length - sDisplayRange.length + 1, 1);
		sFormatted = formatSigFigs(rCoefficient, iSigFigs);
	}
	
	// Comma separate large numbers into thousand groups
	var iDotPos = sFormatted.indexOf(".");
	var sInteger = sFormatted;
	var sFraction = "";
	if (iDotPos != -1)
	{
		sInteger = sFormatted.substring(0, iDotPos);
		sFraction = sFormatted.substr(iDotPos);
	}
	sInteger = sInteger.replace(/(\d)(?=(\d{3})+$)/g, "$1,");
	return sInteger + sFraction + (sUnit == "%" ? sUnit : "\u00A0" + sUnit);
}


// Multi-unit lengths/masses metrification
function cbMultiMetric(oMatch)
{
	var sConverted = oMatch[0];
	if (sConverted.strip())
	{
		// Get metric base unit quantities
		var oMetric, oMetricAddition;
		var bAtLeastTwo = false;
		
		var sPrefix = oMatch[1];
		var sCoefficient = String(oMatch[2]);
		var sGap = oMatch[3];
		
		for (var iUnit = 4; iUnit < arguments.length; iUnit += 3)
		{
			var sUnit = oMatch[iUnit];
			if (sCoefficient && sUnit)
			{
				oMetricAddition = getMetric(oMatch, sCoefficient, sGap, sUnit);
				if (oMetric)
				{
					bAtLeastTwo = true;
					if (oMetricAddition && (oMetricAddition.sUnit == oMetric.sUnit))
					{
						oMetric.rCoefficient += oMetricAddition.rCoefficient;
						oMetric.rPrecision = Math.min(oMetric.rPrecision, oMetricAddition.rPrecision);
					}
				}
				else
				{
					oMetric = oMetricAddition;
				}
				
				sCoefficient = oMatch[iUnit + 1];
				if (String(sCoefficient).strip().match(reUnitSeparator))
				{
					break;
				}
				sGap = oMatch[iUnit + 2];
			}
		}
		
		if (bAtLeastTwo)
		{
			// Format metric quantity
			sConverted = sPrefix + formatMetric(oMetric);
			logChange(oMatch, sConverted);
			m_bChangeMade = true;
		}
	}
	
	return sConverted;
}


// Primary metrification
function cbPrimaryMetric(oMatch, sPrefix, sCoefficient, sGap, sDimension1, sUnit, sDimension2)
{
	var sConverted = oMatch[0];
	
	// Get metric base quantity
	var oMetric = getMetric(oMatch, sCoefficient, sGap, sUnit, sDimension1, sDimension2);
	if (oMetric)
	{
		// Format metric quantity
		sConverted = formatMetric(oMetric);
		
		if ((sPrefix == "(") && (oMatch[0].substr(oMatch[0].length - 1) == ")"))
		{	
			// Complete bracket pair if opening bracket
			sConverted = "(" + sConverted + ")";
		}
		else if (sPrefix)
		{
			// Restore original prefix
			sConverted = sPrefix + sConverted;
		}
		
		logChange(oMatch, sConverted);
		m_bChangeMade = true;
	}
	
	return sConverted;
}


// Regex replace callback for replacing numeric words with numbers
function parseNumberWords(sWords)
{
	var sParsed = sWords;
	var iNumber = 0, iCoefficient = 0;
	var sSuffix = "";
	
	// "Per cent" case
	if (sWords.substr(sWords.length - 9) == " per cent")
	{
		sWords = sWords.substring(0, sWords.length - 9);
		sSuffix = "%";
	}
	
	// "percent" case
	if (sWords.substr(sWords.length - 8) == " percent")
	{
		sWords = sWords.substring(0, sWords.length - 8);
		sSuffix = "%";
	}
	
	sWords = sWords.replace(/\sand\s|,\s|[,\s\-]/g, " ");
	var saBits = sWords.split(" ");
	for (var iBit = 0; iBit < saBits.length; iBit++)
	{
		var sBit = saBits[iBit].toLowerCase();
		if (iaWordNumber[sBit])
		{
			iCoefficient += iaWordNumber[sBit];
		}
		else if (iaWordFactor[sBit])
		{
			if (iBit == saBits.length - 1)
			{
				iNumber += iCoefficient;
				iNumber *= iaWordFactor[sBit];
			}
			else
			{
				iNumber += iCoefficient * iaWordFactor[sBit];
			}
			iCoefficient = 0;
		}
	}
	if (iCoefficient)
	{
		iNumber = iCoefficient;
	}

	var sNumber = String(iNumber).replace(/(\d)(?=(\d{3})+$)/g, "$1,") + sSuffix;
	if (sWords.length > sNumber.length)
	{
		logChange(sWords, sNumber);
		m_bChangeMade = true;
		sParsed = sNumber;
	}
	
	return sParsed;
}


// Efficient once-only regex compilation
function angliciseInit()
{
	// Regex initialisation
	var iPairs = saUStoUK.length;
	for (var iPair = 0; iPair < iPairs; iPair += 2)
	{
		oaRegexs.push(new RegExp("\\b" + saUStoUK[iPair] + "\\b", "gi"));
	}
}


// American spellings to English
function anglicise(sText)
{
	if (sText)
	{
		var iRegexs = oaRegexs.length;
		var sLower = sText.toLowerCase();
		for (m_iRegex = 0; m_iRegex < iRegexs; m_iRegex++)
		{
			if (sLower.indexOf(saUStoUK[m_iRegex * 2]) != -1)
			{
				sText = sText.replace(oaRegexs[m_iRegex], cbAnglicise);
			}
		}
		
		// Special case for lowercase 'i'
		if (reLowerCaseI.test(sText))
		{
			sText = sText.replace(reLowerCaseI, "I");
		}
	}
	
	return sText;
}


// Better regex replacement (passes match object rather than match string to functor)
function regexReplace(sText, oRegex, fnReplace)
{
	var sReplaced;
	var oMatch = oRegex.exec(sText);
	if (oMatch)
	{
		sReplaced = sText.substring(0, oMatch.index) + fnReplace.apply(this, [oMatch].concat(oMatch.slice(1)));
		var iLastIndex = oRegex.lastIndex;
		while ((oMatch = oRegex.exec(sText)))
		{
			sReplaced += sText.substring(iLastIndex, oMatch.index) + fnReplace.apply(this, [oMatch].concat(oMatch.slice(1)));
			iLastIndex = oRegex.lastIndex;
		}
		if (iLastIndex < sText.length)
		{
			sReplaced += sText.substring(iLastIndex);
		}
	}
	else
	{
		// No match
		sReplaced = sText;
	}
	return sReplaced;
}


// Regex application
function applyRegexs(sText)
{
	sText = sText.replace(reUSdate, cbUSdate);
	sText = sText.replace(reDayMonth, cbDayMonth);
	sText = sText.replace(reISO, cbISO);
	sText = sText.replace(reUSnumeric, cbUSnumeric);
	sText = sText.replace(reTwelveHour, cbTwelveHour);
	sText = sText.replace(reBBCtime, cbBBCtime);
	
	sText = regexReplace(sText, reImperialMetricLengths, cbMultiMetric);
	sText = regexReplace(sText, reImperialMetricMasses, cbMultiMetric);
	sText = regexReplace(sText, reMetricImperialLengths, cbMultiMetric);
	sText = regexReplace(sText, reMetricImperialMasses, cbMultiMetric);
	
	sText = regexReplace(sText, reImperialLengths, cbMultiMetric);
	sText = regexReplace(sText, reImperialMasses, cbMultiMetric);
	sText = regexReplace(sText, reMetricLengths, cbMultiMetric);
	sText = regexReplace(sText, reMetricMasses, cbMultiMetric);

	sText = regexReplace(sText, reImperialImperial, cbPrimaryMetric);
	sText = regexReplace(sText, reImperialMetric, cbPrimaryMetric);
	sText = regexReplace(sText, reMetricImperial, cbPrimaryMetric);
	
	sText = regexReplace(sText, reImperial, cbPrimaryMetric);
	sText = regexReplace(sText, reMetric, cbPrimaryMetric);
	
	return sText;
}


// Initialise metrification
metrificationInit();

// Initialise numeric words
numberWordInit();


// Quoted regex recursion
function quoteRecursion(sText)
{
	if (sText.match(/\d/))
	{
		var reQuotedString = new RegExp("(^|\\s|[(=L,{:])(?:(" + DOUBLE_QUOTE_CHARS + ")(.*?)(" + DOUBLE_QUOTE_CHARS + ")|(" + SINGLE_QUOTE_CHARS + ")(.*?)(" + SINGLE_QUOTE_CHARS + "))(?=([,.)}:;?]|\\s|$))", "g");

		// Look for quoted substrings
		var oQuote = reQuotedString.exec(sText);
		if (oQuote)
		{
			// Prefix text and quoted string
			var iStartPos = reQuotedString.lastIndex;
			var sLocal = applyRegexs(sText.substr(0, oQuote.index)) + oQuote[1];
			if (oQuote[2])
			{
				sLocal += oQuote[2] + quoteRecursion(oQuote[3]) + oQuote[4];
			}
			else
			{
				sLocal += oQuote[5] + quoteRecursion(oQuote[6]) + oQuote[7];
			}
			sLocal += oQuote[8];

			while ((oQuote = reQuotedString.exec(sText)))
			{
				// Inner prefix text and quoted string
				sLocal += applyRegexs(sText.substring(iStartPos + 1, oQuote.index)) + oQuote[1];
				if (oQuote[2])
				{
					sLocal += oQuote[2] + quoteRecursion(oQuote[3]) + oQuote[4];
				}
				else
				{
					sLocal += oQuote[5] + quoteRecursion(oQuote[6]) + oQuote[7];
				}
				sLocal += oQuote[8];
				iStartPos = reQuotedString.lastIndex;
			}

			// Suffix text
			if (iStartPos < sText.length)
			{
				sLocal += applyRegexs(sText.substr(iStartPos + 1));
			}
			sText = sLocal;
		}
		else
		{
			// Plain string recursion termination
			sText = applyRegexs(sText);
		}
	}
	
	return sText;
}


// Localise American dates to UK format
function localiseDates(oNode)
{
	var sText = oNode.nodeValue;
	
	// Replace numeric word expressions with numbers
	sText = sText.replace(reTrillion, parseNumberWords);
	sText = sText.replace(reBillion, parseNumberWords);
	sText = sText.replace(reMillion, parseNumberWords);
	sText = sText.replace(reThousand, parseNumberWords);
	sText = sText.replace(reHundred, parseNumberWords);
	sText = sText.replace(reUnits, parseNumberWords);
	
	// If digit present
	if (sText.match(/\d/))
	{
		// Look for quoted substrings
		sText = quoteRecursion(sText);
	}
	
	// Update if change made
	if (m_bChangeMade)
	{
		oNode.nodeValue = sText;
		m_bChangeMade = false;
	}
}


// Apply date localisation to all text nodes
var xpathResult = document.evaluate("//text()[normalize-space()]", document.documentElement, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
for (var iNode = 0; iNode < xpathResult.snapshotLength; iNode++)
{
	var oNode = xpathResult.snapshotItem(iNode);
	if (oNode.nodeValue && oNode.parentNode && !oNode.parentNode.nodeName.match(/script|style/i))
	{
		localiseDates(oNode);
	}
}

// Initialise anglicisation
angliciseInit();

// Correct page title
document.title = anglicise(applyRegexs(document.title));


// URL auto-linkage
function linkURLs(oNode)
{
	var sParentNode = oNode.parentNode.nodeName;
	if (sParentNode != "A" && sParentNode != "TEXTAREA")
	{
		var oLastNode = oNode;
		var sText = oLastNode.nodeValue;
		var bFirst = true;
		do
		{
		
			var oMatch = reURL.exec(sText);
			if (oMatch)
			{
				var sURL = oMatch[0];
				var sPrefix = sText.substring(0, oMatch.index);
				if (bFirst)
				{
					// Trim existing
					oLastNode.nodeValue = sPrefix;
					bFirst = false;
				}
				else
				{
					var oText = document.createTextNode(sPrefix);
					oLastNode.parentNode.insertBefore(oText, oLastNode.nextSibling);
					oLastNode = oText;
				}

				var oA = document.createElement("A");
				oA.appendChild(document.createTextNode(sURL));
				if (sURL.substr(0, 3) == "www")
				{
					oA.href = "http://" + sURL;
				}
				else
				{
					oA.href = sURL;
				}
				oA.target = "_blank";
				oLastNode.parentNode.insertBefore(oA, oLastNode.nextSibling);
				oLastNode = oA;

				sText = sText.substr(oMatch.index + sURL.length);
			}
			else if (bFirst)
			{
				break;
			}
			else
			{
				oLastNode.parentNode.insertBefore(document.createTextNode(sText), oLastNode.nextSibling);
				sText = null;
			}
		}
		while (sText);
	}
}


// Debugging display of changes made
var m_oChangesDiv, m_iChangesTimerID;
function showChanges()
{
	if (sChanged)
	{
		var oBody = document.getElementsByTagName("body")[0];
		
		if (!m_oChangesDiv)
		{
			m_oChangesDiv = document.createElement("div");
			m_oChangesDiv.style.position = "fixed";
			m_oChangesDiv.style.right = "1em";
			m_oChangesDiv.style.top = "1em";
			m_oChangesDiv.style.border = "1px solid black";
			m_oChangesDiv.style.padding = "2px";
			m_oChangesDiv.style.width = "auto";
			m_oChangesDiv.style.backgroundColor = "gray";
			m_oChangesDiv.style.color = "white";
			m_oChangesDiv.style.fontFamily = "MS Sans Serif";
			m_oChangesDiv.style.fontSize = "8pt";
			m_oChangesDiv.style.zIndex = 5000;
			m_oChangesDiv.style.lineHeight = "13px";
			m_oChangesDiv.style.textAlign = "left";
			oBody.appendChild(m_oChangesDiv);
		}
		
		var iLines = sChanged.split("\n").length - 1;
		m_oChangesDiv.style.height = (13 * iLines) + "px";
		m_oChangesDiv.innerHTML = sChanged.substr(1).replace(/\n/g, "<br/>");
		
		if (m_iChangesTimerID)
		{
			m_iChangesTimerID = clearTimeout(m_iChangesTimerID);
		}
		
		m_iChangesTimerID = setTimeout(function()
		{
			oBody.removeChild(m_oChangesDiv);
		}, 3500 + (400 * iLines));
		
		m_oChangesDiv.addEventListener("mouseover", function()
		{
			if (m_iChangesTimerID)
			{
				m_iChangesTimerID = clearTimeout(m_iChangesTimerID);
			}
		}, false);
		
		m_oChangesDiv.addEventListener("mouseout", function()
		{
			m_iChangesTimerID = setTimeout(function()
			{
				oBody.removeChild(m_oChangesDiv);
			}, 1500);
		}, false);
	}
}

// 5 nodes at a time, with 15ms separation for rendering smoothness
iNode = 0;
function nodeUpdate()
{
	var iSet = 0;
	while (iNode < xpathResult.snapshotLength)
	{
		var oNode = xpathResult.snapshotItem(iNode);
		if (oNode.nodeValue && oNode.parentNode && !oNode.parentNode.nodeName.match(/script|style/i))
		{
			oNode.nodeValue = anglicise(oNode.nodeValue);
			linkURLs(oNode);
		}
		iNode++;
		if (++iSet == 5)
		{
			break;

		}
	}
	if (iNode == xpathResult.snapshotLength)
	{
		clearInterval(m_iNodeTimer);
		xpathResult = undefined;
	}
	showChanges();

}
var m_iNodeTimer = setInterval(nodeUpdate, 15);