function showPopUp(el)
{
	var cvr = document.getElementById("cover");
	var dlg = document.getElementById(el);
	
	cvr.style.display = "block";
	dlg.style.display = "block";
	
	if (document.body.style.overflow = "hidden")
	{
	        cvr.style.width = "100%";
	        cvr.style.height = "100%";
        }
}

function closePopUp(el)
{
	var cvr = document.getElementById("cover");
	var dlg = document.getElementById(el);
	cvr.style.display = "none";
	dlg.style.display = "none";
	document.body.style.overflowY = "scroll";
}