Jquery is probably the easiest way to add fancy javascript functions to your website. Also, iWeb is also the fanciest tool to build your web in Mac.
It's a good idea to use both in your web development. However, they are not compatible by default, since the iWeb output source code contains many javascript files that might conflict with the jquery syntax.
However, jquery has provided a solution to solve the conflict between Jquery and other javascript library.
You can simply add
jQuery.noConflict();
and the conflict is solved and you can successfully use the jquery functions in iWeb output source code.
Further details can be found in the following link:
Using jQuery with Other Libraries


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