How to freeze asp.net web page using div and styles

Style class

style>
.Freezing
   {

   position:relative ;
   table-layout:fixed;
   top:expression(this.offsetParent.scrollTop);  
   z-index: 10;
   }
.Freezing th{text-overflow:ellipsis;overflow:hidden;white-space: nowrap;padding:2px;}
/style>

Div tag which we want freeze

    div id="divheader" class="Freezing">

/div>