function Validtext(thisForm)
{

  if (thisForm.first_name.value == "")
  {
    alert("Please enter a value for the \"First Name\" field.");
    thisForm.first_name.focus();
    return (false);
  }


  if (thisForm.last_name.value == "")
  {
    alert("Please enter a value for the \"Last Name\" field.");
    thisForm.last_name.focus();
    return (false);
  }

  if (thisForm.company.value == "")
  {
    alert("Please enter a value for the \"Company\" field.");
    thisForm.company.focus();
    return (false);
  }

  if (thisForm.phone.value == "")
  {
    alert("Please enter a value for the \"Phone\" field.");
    thisForm.phone.focus();
    return (false);
  }


  return (true);  
}