var popUpWin=0;
function popUpWindow(URLStr, width, height)
{
	var screenWidth = screen.width;
	var screenHeight = screen.height;
	var left = (screenWidth/2)-(width/2);
	var top = (screenHeight/2)-(height/2);
	if(popUpWin)
	{
		if(!popUpWin.closed) popUpWin.close();
	}
	popUpWin = open(URLStr, 'popUpWin', 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,copyhistory=yes,width='+width+',height='+height+',left='+left+', top='+top+',screenX='+left+',screenY='+top+'');
}

function openWindow(URLStr, windowName, width, height)
{
	window.open(URLStr, windowName, 'width=' + width + ', height=' + height + ',resizable=no,scrollbars=no,status=no');	
}