JQuery is a JavaScript library that emphasizes interaction between JavaScript and HTML.JQuery simplifies the use of JavaScript and also can enhance your web application by adding a lot of professionalism and usability.It is a great tool for webmasters as JQuery is SEO friendly too,which makes it a better option than Flash.JQuery exists as a single JavaScript files which contains the DOM,Events,effects and Ajax functions.Here we will create a Cascading Menu using JQuery.