var popUpWin=0;

function popUpWindow(URLStr, titleStr, width, height)

{
    if(popUpWin)
	{
	    if(!popUpWin.closed) popUpWin.close();
	}
    popUpWin = window.open(URLStr, "Popup", 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbar=no,resizable=no,title='+titleStr+',copyhistory=yes,width='+width+',height='+height);
}