To get started with jQuery UI, you need to download the library and add it to your web pages. You can download the jQuery library from http://jqueryui.com/download/ by selecting the options that you would like to include and clicking on the Download button at the bottom. This downloads the jQuery UI files.
When you download the jQuery UI library, you get a zip file. Inside that file are three main folders that you need to understand. They are
js—This is the folder that contains the jQuery UI and jQuery libraries files. You need to deploy these files so you can load them in your web pages.
css—This contains the theme-named ...