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