function validator(form) { 

  if (form.name.value == "") {
    alert("Please provide us with your Name.");
    form.name.focus();
    return false;
  }
  if (form.email.value == "") {
    alert("Please provide us with a valid Email Address.");
    form.email.focus();
    return false;
  }
  if (form.phone.value == "") {
    alert("Please provide us with a valid Telephone Number.");
    form.phone.focus();    
    return false;
  } 
return true; 
}