How to Freeze GridView Header While Scrolling ?

This thing is working for both horizontal and verticle scrolling. Here id of the div is hard coded but you can use jquery to attach css class to div element.

 
div#gridPanel 
{
   width:900px;
   overflow:scroll;
   position:relative;
}


div#gridPanel th
{  
   top: expression(document.getElementById("gridPanel").scrollTop-2);
left:expression(parentNode.parentNode.parentNode.parentNode.scrollLeft);
   position: relative;
   z-index: 20;
}

aspx code

   asp.net grid view