function popUpWindow(URLStr){
var popUpWin=0;
    if(popUpWin){
        if(!popUpWin.closed){
	        popUpWin.close();
        }
    }
popUpWin = open(URLStr, 'popUpWin', 'scrollbars=yes,resizable=yes,width=500,height=500,left=0, top=0');
popUpWin.focus();
}