jQuery UI

Three ways of downloading or install jQuery UI :

1  default package:
You can download the jQuery UI 1.8.4 ( zip ~1 MB ) which contains the complete set of all jQuery UI 1.8 components and the Smoothness theme.
Just click http://jqueryui.com/download/jquery-ui-1.8.4.custom.zip
2 customize package :
You can download the customize package in which you can select the following option :

• UI core
• Interactions
• Widgets
• Effects
• Theme
• Version

After selecting these option you have to click the 'download ' button and you'll get a customized zip file containing everything you selected.
After downloading you'll get a zip containing the following files:

• /css/
• /development-bundle/
• /js/
• index.html

Adding jQuery UI on web page :

<link type="text/css" href="css/themename/jquery-ui-1.8.4.custom.css" 
      rel="Stylesheet" /> 
<script type="text/javascript" src="js/jquery-1.4.2.min.js">
</script>
<script type="text/javascript" src="js/jquery-ui-1.8.4.custom.min.js">
</script>

 

3 :
By adding google api url :
For example , we can add jQuery UI on web page as :

<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js">

</script>