function validate(f) {

   var i;

  
  if (f.elements["FIRST_NAME"].value == "") {
    f.elements["FIRST_NAME"].focus();
    alert("Please enter your first name.")
    return false;
  }
  

  if (f.elements["LAST_NAME"].value == "") {
    f.elements["LAST_NAME"].focus();
    alert("Please enter your last name.")
    return false;
  }
  
          if (f.elements["EMAIL_ADDRESS"].value == "") {
    f.elements["EMAIL_ADDRESS"].focus();
    alert("Please enter your e-mail address.")
    return false;
  }
  
  if (f.elements["INQUIRY_COMMENTS"].value == "") {
    f.elements["INQUIRY_COMMENTS"].focus();
    alert("Please let us know your needs.")
    return false;
  }
  
  

  // All input validated, return true.

  return true;
}