function openPopup(htmlfile,w,h) { 
    window.open(htmlfile, "myWin", "status=no,scrollbars=no,tollbar=no,menubar=no,resizable=no,copyhistory=no,width="+w+",height="+h);
}

function check_email(myLang) {
    if(document.forms[0].Mail.value == "" || document.forms[0].Mail.value.indexOf("@") == -1) {
        'd' == myLang?alert("Bitte E-mail ausfüllen."):alert("Please fill in your email.");
        document.forms[0].Mail.focus();
        return false;
    }
}