function popupCenter(url, name, width, height, sbars)
		{
			var left = (screen.width - width) / 2;
			var top  = (screen.height - height) / 2;
			var options = "left=" + left + ",top=" + top +",width=" + width + ",height=" + height + ",scrollbars=" + sbars;
			newWin = window.open(url, name, options);
			return newWin.focus();
		}