function validatecontactform() {

    var strFName = "";
    var strLName = "";
    var strEmail = "";

    // Store all the field values in the variables.
    strFName = document.contactus.firstname.value;
    strLName = document.contactus.lastname.value;
    strEmail = document.contactus.email.value;
    //Validate First name
    if (strFName == '') {

        // $("#ErrorName")[0].innerHTML = "<span style='color:red'>Name Required</span>"
        alert('Please enter your first name.');
        document.contactus.firstname.focus();
        return false;
    }
    if (strLName == '') {

        // $("#ErrorName")[0].innerHTML = "<span style='color:red'>Name Required</span>"
        alert('Please enter your last name.');
        document.contactus.lastname.focus();
        return false;
    }

    //Validate for email.
    if (strEmail == '') {

        alert('Please enter your email.');

        // $("#ErrorEmail")[0].innerHTML = "<span style='color:red'>Email Required</span>"
        document.contactus.email.focus();
        return false;
    }

    //document.contactivesia.submit();
    //document.URL="thankyou.html"
    return true;
}