There are 3 previous versions of this script.
// ==UserScript==
// @name StackExchange Oldest Answer Sort Order
// @namespace yijiang
// @include http://stackoverflow.com/questions/*
// @include http://meta.stackoverflow.com/questions/*
// @include http://superuser.com/questions/*
// @include http://meta.superuser.com/questions/*
// @include http://serverfault.com/questions/*
// @include http://meta.serverfault.com/questions/*
// @include http://askubuntu.com/questions/*
// @include http://meta.askubuntu.com/questions/*
// @include http://answers.onstartups.com/questions/*
// @include http://meta.answers.onstartups.com/questions/*
// @include http://nothingtoinstall.com/questions/*
// @include http://meta.nothingtoinstall.com/questions/*
// @include http://seasonedadvice.com/questions/*
// @include http://meta.seasonedadvice.com/questions/*
// @include http://crossvalidated.com/questions/*
// @include http://meta.crossvalidated.com/questions/*
// @include http://stackapps.com/questions/*
// @include http://*.stackexchange.com/questions/*
// ==/UserScript==
if(!isNaN(parseInt(window.location.pathname.split('/')[2]), 10)){
var answers = document.getElementById('answers').children,
answerElements = [];
pages = false,
cookieName = 'oldest:pref';
for(var i = answers.length - 1; i >= 0 ; i--){
if((answers[i].className + ' ').indexOf('answer ') > -1){
answerElements.push(answers[i]);
} else if((answers[i].className + ' ').indexOf('pager-answers ') > -1){
pages = true;
break;
}
}
if(!pages){
var Cookie = {
create: function (name,value,days) {
var date = new Date();
date.setTime(date.getTime()+(days*24*60*60*1000));
var expires = "; expires="+date.toGMTString();
document.cookie = name+"="+value+expires+"; path=/";
},
read: function(name) {
var nameEQ = name + "=";
var ca = document.cookie.split(';');
for(var i=0;i < ca.length;i++) {
var c = ca[i];
while (c.charAt(0)==' ') c = c.substring(1,c.length);
if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
}
return null;
},
erase: function(name) {
this.create(name,"",-1);
}
}
var tabs = document.getElementById('tabs').children,
a = document.createElement('a'),
sortedAnswer = [],
acceptedAnswer;
a.href = '#';
a.innerHTML = 'oldest';
document.getElementById('tabs').insertBefore(a, tabs[0]);
for(var i = 0; i < answerElements.length; i++){
var accepted = false;
if(document.querySelectorAll){
accepted = !!answerElements[i].querySelectorAll('.vote-accepted-on').length;
} else {
var spans = answerElements[i].getElementsByTagName('span');
for (var i = 0; i < spans.length; i++){
if((spans[i].className + ' ').indexOf('vote-accepted-on ') > -1){
accepted = true;
break;
}
}
}
if(accepted){
acceptedAnswer = answerElements.splice(i, 1)[0];
break;
}
}
function oldest(){
var answer = document.getElementById('answers'),
header = document.getElementById('answers-header').nextSibling,
i, j, l = answerElements.length;
if(acceptedAnswer) answer.insertBefore(acceptedAnswer, header);
for(i = 0; i < l; i++){
var pos = answerElements.length - 1;
lastAnswer = +answerElements[pos].id.substring(7);
for(j = 0; j < answerElements.length; j++){
if(+answerElements[j].id.substring(7) < lastAnswer){
lastAnswer = +answerElements[j].id.substring(7);
pos = j;
}
}
answer.insertBefore(answerElements.splice(pos, 1)[0], header);
}
for(i = 0; i < tabs.length; i++){
tabs[i].className = '';
}
a.className = 'youarehere';
for(i = 0; i < answerElements.length; i++){
answer.removeChild(answerElements[i]);
}
oldest = function(){};
}
if(Cookie.read(cookieName)){
oldest();
}
a.addEventListener('click', function(evt){
oldest();
Cookie.create(cookieName, true, 3650);
evt.preventDefault();
}, false);
for(var i = 1; i < tabs.length; i++){
tabs[i].addEventListener('click', function(){
Cookie.erase(cookieName);
}, false);
}
}
}
