function validate_submit() {
    var form = window.document.passwordform;
    if (form.username.value == "") {
        alert("Please enter your User ID to Login.");
        form.username.focus();
        return false;
    } else if (form.password.value == "") {
        alert("Please enter your Password.");
        form.password.focus();
        return false;
    } else {
        return true;
    }
}