If you mean after page is loaded on the client, then you can use this ASP.NET Ajax code: (It requires that you have a
asp:ScriptManager
on the page to enable AJAX)
<script type="text/javascript">
var prm = Sys.WebForms.PageRequestManager.getInstance();
if(prm) prm.add_pageLoaded( PageLoadedEventHandler );
function PageLoadedEventHandler()
{
// Do your stuff
}
</script>