http://jqueryui.com/themeroller/
You can customize your UI skin by entering this page
As shown above, click on the Gallery option on the tab bar on the left side of the Web page to list the official jquery skin below, and click on any set of skins below to jump to Rool Your Own, which can customize the skin you want on the basis of your chosen skin. The customization process is WYSIWYG, all easy to use, after customization, click Rool Your own below the download theme jump to the download page,
Click the Download button on the right side of the download page to download the skin to your own machine, before downloading you can choose to download the 1.7.2 version or 1.6 version of the page, there are other options, you can choose to download the various UI Plug-ins skin style, such as dialog, Tabls, General election, otherwise there is no meaning. After downloading we will get a jquery-ui-1.7.2.custom.zip compression package, extract the customized skin file in the "Download folder \jquery-ui-1.7.2.custom\development-bundle\themes\" Custom-theme folder.