function popupCallback() 
{

	var fadediv = new Element("div", {"style": "z-index: 3;background-color: #000000;width: 100%; height: 100%; position: absolute; top:0; left:0;"}).addEvents({
		click: function()
		{
			$("popupcallback").setStyle("display", "none");
			fadediv.dispose();
		}
	});
	
	fadediv.setStyle("opacity", 0);
	fadediv.injectInside(document.body);
	var myFxcb = new Fx.Tween(fadediv, {duration:'long'});
	myFxcb.start("opacity", 0.5).chain(function(){
			
						$("popupcallback").setStyle("display", "block");
							$("popupcallback").setStyles({
							left: "50%",
							top: "50%",
							"margin-left": "-153px",
							"margin-top": "-103px"
							});
					});
	
	
}