Dynamically calculate the Popup window Position using Javascript

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ASP.NET

Hi All,
I have to display a popup window using Div tag on a word mousehover, so i tried 2 different Javascript method to dynamically calculate the position of popup window, but non of them working properly, please help me to find the solution:
My method :

function findPosss(obj)
        {
         var obj2 = obj;
         var curtop = 0;
         var curleft = 0;
         if (document.getElementById || document.all) {
          do  {
           curleft += obj.offsetLeft-obj.scrollLeft;
           curtop += obj.offsetTop-obj.scrollTop;
           obj = obj.offsetParent;
           obj2 = obj2.parentNode;
           while (obj2!=obj) {
            curleft -= obj2.scrollLeft;
            curtop -= obj2.scrollTop;
            obj2 = obj2.parentNode;
           }
          } while (obj.offsetParent)
         } else if (document.layers) {
          curtop += obj.y;
          curleft += obj.x;
         }
         return [curleft,curtop];
        }   // end of findPos()

          function getOffset( el )
          {
            var _x = 0;
            var _y = 0;
            while( el && !isNaN( el.offsetLeft ) && !isNaN( el.offsetTop ) ) {
                _x += el.offsetLeft - el.scrollLeft;
                _y += el.offsetTop - el.scrollTop;
                el = el.offsetParent;
            }
            return [_x,_y];//{ top: _y, left: _x }
        }

Note: Indirectly you can say i want to dssplay tooltip in IE browser using Javascript.

Any help is appreciated.

Thanks
AP