function Login(form) {
    var username = form.username.value;
    var password = form.password.value;
    var server = form.server.value;
    if (username && password && server) {
	    // width='+(screen.AvailWidth-10)+',height='+(screen.AvailHeight-100)+',left=0,top=0,
            window.open("ftp://" + username + ":" + password + "@" + server, '_blank','scrollbars=yes,toolbar=yes,location=yes,status=yes,copyhistory=no,menubar=no,resizable=yes');
    } else {
            alert("Vul in de gebruikersnaam en/of het wachtwoord! ");
    }
}