if(document.layers) 
{ 
	document.captureEvents(Event.MOUSEMOVE);
	document.onmousemove = captureMousePosition;
} 
else if(document.all) 
	document.onmousemove = captureMousePosition;
else if(document.getElementById)  
	document.onmousemove = captureMousePosition;

var xMousePos = 0; 
var yMousePos = 0; 

function captureMousePosition(e) 
{
	if(document.layers) 
	{
		xMousePos = e.pageX;
      yMousePos = e.pageY;
   } 
   else if(document.all) 
   {
		xMousePos = window.event.x+document.body.scrollLeft;
      yMousePos = window.event.y+document.body.scrollTop;
   } 
   else if(document.getElementById) 
   {
		xMousePos = e.pageX;
      yMousePos = e.pageY;
   }
}