var newWindow;
		function popupWindow( pageURL, winHeight, winWidth )
		{
			if (newWindow && newWindow.open && !newWindow.closed) newWindow.close();
			LeftPosition = (screen.width) ? (screen.width-winWidth)/2 : 0;
			TopPosition = (screen.height) ? (screen.height-winHeight)/2 : 0;

				newWindow = window.open(pageURL,'newWin','toolbar=no,location=no,scrollbars=yes,resizable=yes,status=no,menubar=no,titlebar=no,width='+
									winWidth+',height='+winHeight+',left='+LeftPosition+',top='+TopPosition );

			newWindow.focus();
		}