JavaScript Unit Testing

Taken from: http://www.ibm.com/developerworks/java/library/os-jstesting/index.html?ca=drs-

Summary:  JavaScript code that runs on one browser does not necessarily mean it will work on others. Without unit testing this code, organizations pay money for testing and re-testing web applications when deciding to upgrade or support new browsers. In this article, learn how efficient unit testing of your JavaScript can reduce testing costs and make it easier for you to support more browsers.