function showPopUpWithId(menuElement, id)
{
  element = document.getElementById(id);
  element.style.top = findPosY(menuElement);
  element.style.display = "block";
}
function hidePopUpWithId(id)
{
document.getElementById(id).style.display = "none";
}

// from http://www.quirksmode.org/js/findpos.html
function findPosX(obj)
{
	var curleft = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curleft += obj.offsetLeft
			obj = obj.offsetParent;
		}
	}
	else if (obj.x)
		curleft += obj.x;
	return curleft;
}

function findPosY(obj)
{
	var curtop = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curtop += obj.offsetTop
			obj = obj.offsetParent;
		}
	}
	else if (obj.y)
		curtop += obj.y;
	return curtop;
}