hi,
here is
The latest version of jQuery as of this writing is jQuery 1.2.6 and can be downloaded from http://code.google.com/p/jqueryjs/downloads/detail?name=jquery-1.2.6.js. [Update] An updated version of jQuery 1.4.2 has been released. http://code.jquery.com/jquery-1.4.2.js and http://code.jquery.com/jquery-1.4.1-vsdoc.js. So whereever you see 1.2.6 mentioned in the rest of this article, just replace it with 1.4.2.
this will help you completely