function popup(x,w,h) {
    newwin = window.open(x ,"","toolbar=0,location=0,directories=0,status=no,menubar=no,scrollbars=1,resizable=yes,copyhistory=0,menuBar=0,width="+ w+ ",height=" + h + ",left=400,top=250");
    if (navigator.appName == "Netscape" && parseInt(navigator.appVersion.substring(0,1)) >= 3)
    newwin.focus();
};