javascript is the most important language on the modern web-- and jQuery is it's most important framework. With an understanding of basic javascript, you can use jQuery and create powerful, impressive visual effects, interface widgets and other site features. If you're worried about cross-browser compatibility problems, jQuery just might be the recipe you've been searching. jQuery commands, methods and widgets perform the same on all modern browsers making it easier to create a powerful interface on your site that is enjoyed by ALL users.