Here, you will learn how to create and configure a framed scrolling text for your page. You can also alter speed of the scrolling text. http://www.htmlgoodies.com/beyond/javascript/article.php/3472361
Learn how to restrict access of your libraries to only your own sites, warding off bandwidth theft in the process. http://www.javascriptkit.com/javatutors/externalrestrict.shtml
This little trick, achieved using Javascript, allows you to essentially build an entire profile on your visitors. http://www.talkphp.com/javascript-ajax-e4x/1386-perfect-trick-prying-e...