function checkCallBack(namefield, phonefield) {
   
    namevalue = namefield.value;
    phonevalue = phonefield.value;

    if (namevalue != '' && namevalue != 'Your name...' && phonevalue != '' && phonevalue != 'Your phone...') {
        return true
    }
    else {
        alert('Please enter your name and your phone number.');
        return false
    }
}