Neat little example which displays what JavaScript version the visitor's browser supports. It's pretty neat, extremely simple. Check it out!
Free Script And Source
Code For Webmaster ,ASP,HTML,VB,Java, Java Script, Dhtml,xml,ajax,programming: user-details: JavaScript Version
Simply click inside the window below, use your cursor to highlight the script, and copy (type Control-c or Apple-c) the script into a new file in your text editor (such as NotePad or SimpleText) and save (Control-s or Apple-s). The script is yours!