This script allows you to quickly have any page you're on refresh at a set interval until you tell it to stop. The script adds a refresh icon to the top right of your pages. When you click this icon, a text box becomes visible beneath it. Enter in the number of seconds to refresh and press enter (or select outside the text box). The page will refresh then continue to refresh every X seconds. To stop the page from refreshing, simply click the refresh icon again. The page, however, will refresh once more before it completely stops (or you can refresh manually after stopping). The refresh icon is not at the very top of the page (25px down) to avoid overlapping pages with text in the top right (Google Calendar for example). The placement of the icon can easily be customized by modifying the code.

Please leave some feedback and let me know if you encounter any errors, and if so, say what the error was and what web page you were trying to refresh. Thanks. :-)

Notes:
Future upgrades may include a feature to activate an alert when the page contents changes.
The script "remembers" websites that you're refreshing. If you navigate away from the page without stopping it, then the page will start refreshing again once you go back to it.