var videooverlay = null;
var iframe = null;
function showVideo(url) {
	iframe = document.createElement("iframe");
	iframe.setAttribute("id", "videoiframe");
	iframe.setAttribute("width", "560");
	iframe.setAttribute("height", "315");
	iframe.setAttribute("frameborder", "0");
	iframe.setAttribute("src", url);
	if(videooverlay == null) {
		videooverlay = $("#videooverlay").overlay({
			onBeforeLoad: function(e) { $("#videooverlay_content").append(iframe); }, 
			top: 160,
			mask: {
				color: '#222',
				loadSpeed: 200,
				opacity: 0.5
			},
			closeOnClick: false,
			onClose: function(e) { $("#videoiframe").remove(); iframe = null;},
			load: true
		});		
	}
	else {
		videooverlay.overlay({			
			onBeforeLoad: function(e) { $("#videooverlay_content").append(iframe); }, 
			onClose: function(e) { $("#videoiframe").remove(); iframe = null;} 
		}).load();
	}
}