function VerifyEmail() {
    if (emptyField(document.getElementById("txtFrom"))) {
        alert('Please Enter Your Email Address.');
        document.getElementById("txtFrom").focus();
        document.getElementById("txtFrom").select();
        return false;
    }

    if (!validEmailId(document.getElementById("txtFrom").value)) {
        alert('Please Enter Valid Email Id');
        document.getElementById("txtFrom").focus();
        document.getElementById("txtFrom").select();
        return false;
    }

    if (emptyField(document.getElementById("txtSubject"))) {
        alert('Please Enter Subject.');
        document.getElementById("txtSubject").focus();
        document.getElementById("txtSubject").select();
        return false;
    }

    if (emptyField(document.getElementById("txtDescription"))) {
        alert('Please Enter Your Message.');
        document.getElementById("txtDescription").focus();
        document.getElementById("txtDescription").select();
        return false;
    }
}