function validateRequired(field) {
  with (field) {
    if (value==null||value=="") {
      alert('Please fill out your Name, Telephone and Email information and then click the "SUBMIT" button');
      return false;
    } 
    else {
      return true;
    }
  }
}

function validateForm(thisForm) {
  with (thisForm) {
    if (
      (validateRequired(name)==false) ||
      (validateRequired(email)==false) ||
      (validateRequired(phone)==false)
    ) {
      return false;
    }
  }
}