Installating jQuery is very easy.
jQuery is normal javascript file only. Just you have to import this javascript file in your application.
It is available at http://docs.jquery.com/Downloading_jQuery. Download it and rename it as jquery.js.
After that you have to import this file into your application like normal javascript file as shown below.
<html>
<head>
<title>This is for jquery</title>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">
//your javascript code here
</script>
</head>
<body>
//your body
</body>
</html>
Now you are ready to use jQuery features in your web applications or website.
In my next posts, I will explain how to use jQuery for your different needs.