function validate_form(theForm)
{

  if (theForm.First_Name.value == "")
  {
    alert("Please enter a value for the \"First Name\" field.");
    theForm.First_Name.focus();
    return (false);
  }
  
  if (theForm.Last_Name.value == "")
  {
    alert("Please enter a value for the \"Last Name\" field.");
    theForm.Last_Name.focus();
    return (false);
  }

  if (theForm.Date_Purchased_Month.value == "")
  {
    alert("Please enter a value for the \"Date Purchased Month\" field.");
    theForm.Date_Purchased_Month.focus();
    return (false);
  }

  if (theForm.Date_Purchased_Day.value == "")
  {
    alert("Please enter a value for the \"Date Purchased Day\" field.");
    theForm.Date_Purchased_Day.focus();
    return (false);
  }
  
  if (theForm.Date_Purchased_Year.value == "")
  {
    alert("Please enter a value for the \"Date Purchased Year\" field.");
    theForm.Date_Purchased_Year.focus();
    return (false);
  }
  
  if (theForm.Street_Address.value == "")
  {
    alert("Please enter a value for the \"Street Address\" field.");
    theForm.Street_Address.focus();
    return (false);
  }
 
  if (theForm.Email.value == "")
  {
    alert("Please enter a value for the \"Email\" field.");
    theForm.Email.focus();
    return (false);
  }
  
  return (true);
}