function absPosition(obj) { 
      var x = y = 0; 
      while(obj) { 
            x += obj.offsetLeft; 
            y += obj.offsetTop; 
            obj = obj.offsetParent; 
      } 
      return {x:x, y:y}; 
}
function description()
{
	var elem=document.getElementById('layer_above');
	var position=absPosition(document.getElementById('href_descr'));
	
		elem.style.left=position.x-150+"px";
		elem.style.top=position.y-20+"px";
		
		elem.style.display="block";
}
function hide()
{
	document.getElementById('layer_above').style.display="none";
}