[DotNetDevelopment] how to write friendly URL

[arya]

I have webpage with the  name  mobi.aspx,
 it takes parameter id through querystring  and displays data.
so
          mobi.aspx?id=1233

but i need friendly url look like this mobi.aspx/1233

How to write for this Httphandler file and what settings or register
in web.config.
or
any other solutions please tell me