function validate() {
    if (document.form.tbName.value == "") {
        alert("Please enter your name.");
        document.form.tbName.focus();
        return false;
    }

    if (document.form.tbEMail.value == "") {
        alert("Please enter your email");
        document.form.tbEMail.focus();
        return false;
    }
    if (document.form.tbEMail.value != "") {
        if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(document.form.tbEMail.value)) {
            return true;
        }
        else {
            alert("Invalid E-mail Address! Please re-enter.")
            document.form.tbEMail.focus();
            return false;
        }
    }
    return true;
}