var popUpWin=0;
function popUpWindow(URLStr){
    var left  = 300;
    var top   = 100;
    var width = 450; 
    var height = 500; 
    
    if(popUpWin){
        if(!popUpWin.closed) popUpWin.close();
    }
    popUpWin = open(URLStr, 'popUpWin', 'toolbar=no,location=no,directories=no,status=no,menub ar=no,scrollbar=no,resizable=no,copyhistory=yes,width='+width+',height='+height+',left='+left+', top='+top+',screenX='+left+',screenY='+top+'');
}