How to redirect form submit to original form

Ok, I have a form which sits inside of a popup box. I want the confirmation message to display inside of the pop up box when the form has been successfully submitted.

How do I do this?

I have the site live that I am working on, take a look here www.firestarmediallc.com

When you get to the site, click the GET QUOTE link on the top of the page and the box will appear.

Actually, if you guys could take a look at the mailer functions and see if those are correct too, that would be awesome. I have been trying to get this form functional for the last two days and haven't had any luck.

Sorry, I just realized that you can't see the php file. Thank you in advance. Here it is:

<?php
if(isset($_POST['email'])) {

// EDIT THE 2 LINES BELOW AS REQUIRED
$email_to = "tabethamoe@yahoo.com";
$email_subject = "Quote Request";


function died($error) {
    // your error code can go here
    echo "We are very sorry, but there were error(s) found with the form you submitted. ";
    echo "These errors appear below.<br /><br />";
    echo $error."<br /><br />";
    echo "Please go back and fix these errors.<br /><br />";
    die();
}

// validation expected data exists
if(!isset($_POST['name']) ||
    !isset($_POST['email']) ||
    !isset($_POST['phone']) ||
    !isset($_POST['comments'])) {
    died('We are sorry, but there appears to be a problem with the form you submitted.');       
}

$first_name = $_POST['name']; // required
$email_from = $_POST['email']; // required
$telephone = $_POST['phone']; // not required
$comments = $_POST['comments']; // required

$error_message = "";
$email_exp = "^[A-Z0-9._%-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$";
if(!eregi($email_exp,$email_from)) {
    $error_message .= 'The Email Address you entered does not appear to be valid.<br />';
}
$string_exp = "^[a-z .'-]+$";
if(!eregi($string_exp,$first_name)) {
    $error_message .= 'The Name you entered does not appear to be val开发者_Python百科id.<br />';
}

if(strlen($comments) < 2) {
    $error_message .= 'The Comments you entered do not appear to be valid.<br />';
}
if(strlen($error_message) > 0) {
    died($error_message);
}
$email_message = "Form details below.\n\n";

function clean_string($string) {
  $bad = array("content-type","bcc:","to:","cc:","href");
  return str_replace($bad,"",$string);
}

$email_message .= "Name: ".clean_string($name)."\n";
$email_message .= "Email: ".clean_string($email_from)."\n";
$email_message .= "Telephone: ".clean_string($phone)."\n";
$email_message .= "Comments: ".clean_string($comments)."\n";


// create email headers
$headers = 'From: '.$email_from."\r\n".
'Reply-To: '.$email_from."\r\n" .
'X-Mailer: PHP/' . phpversion();
@mail($email_to, $email_subject, $email_message, $headers);  
?>

$('#contactform').submit(function () {
    sendContactForm();
    return false;
});

<?php
}
?>

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The site's not loading, but if you want a form to submit to itself, you simply have:

[... deleted irrelevant code, now that I can see how the site works...]