Asp.net Custom Paging Problem

Hi Gurus,    I have gridview and custom paging, when i click on custom paging number then it should attach to the querystring    and page should be loaded.            For eg : if my url is :         http://localhost/WebSite1/Default.aspx?Customer=1                  then if i click the paging(1,2,3 etc),then it should look like the below and should load the page.               http://localhost/WebSite1/Default.aspx?Customer=1&Page=1                       likewise, if i click on paging 2 it should attach 2 in the querystring and should load the page.              http://localhost/WebSit ...