function popup(URL){
        ver = parseInt(navigator.appVersion.substring(0,1));
        newWin=window.open(URL,'popup_window','top=75,left=100,menubar=no,toolbar=no,status=yes,width=540,height=450,resizable=yes,scrollbars=yes');
                if ((!((navigator.appName == "Netscape")&&(ver==2))) && (!((navigator.appName == "Microsoft Internet Explorer")&&(ver<4)))){ setTimeout("if (newWin) newWin.focus();",1000);}
}