function clearcontrols() {
    document.getElementById('txtName').value = "";
    document.getElementById('txtPostalAddress').value = "";
    document.getElementById('txtPhone').value = "";
    document.getElementById('txtEmail').value = "";
    document.getElementById('txtAreaMessage').value = "";
    document.getElementById('txtContactTime').value = "";
    document.getElementById('chkBox').Checked = false;
    return false;
}