I have the following code:

HTML Code:
			<form name="contact" method="POST" action="<?php $PHP_SELF; ?>">
<table width="456" border="0" cellpadding="0" cellspacing="0">
   <tr>
      <td height="28" valign="top">Your name:</td>
      <td><input name="name" type="text"></td>
   </tr>
   
   <tr>
      <td height="28" valign="top">Subject:</td>
      <td><input name="subject" type="text"></td>
   </tr>
   <tr>
      <td height="28" valign="top">E-mail address:</td>
      <td><input name="email" type="text"></td>
   </tr>
   <tr>
      <td height="28" valign="top">Contact No:</td>
      <td><input name="contact" type="text"></td>
   </tr>
   <tr>
      <td height="28" valign="top">Message:</td>
      <td><input name="message" type="text"/></td>
   </tr>
   <tr>
      <td>&nbsp;</td>
      <td valign="top" align="center">
      <input type="submit" value="Submit" name="submit"></td>
   </tr>
</table>
</form>
and the processing php code:

PHP Code:
<?php
if(isset($_POST['submit'])) {
   $to = $user->email;     //put your email address on which you want to receive the information
   $subject = $_POST['subject'];   //set the subject of email.
   $headers  = "From:".$_POST['email'];
   $headers  .= 'MIME-Version: 1.0' . "\r\n";
   $headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
   $message = "<table><tr><td>Your Name</td><td>".$_POST['name']."</td></tr>
               <tr><td>E-Mail</td><td>".$_POST['email']."</td></tr>
               <tr><td>Contact No</td><td>".$_POST['contact']."</td></tr>
               <tr><td>Message</td><td>".$_POST['message']."</td>
               </tr></table>" ;
   $sendemail = mail($to, $subject, $message, $headers);
   
   if ($sendemail){
       echo "Email Sent Correctly";
   }
   else {
       echo "Email Not Sent";
   }
}
?>
I have not been able to make it work with a modal popup without it closing the popup window and not validating the form. Does anybody know of a form that would allow me to make it work or help me adjust the code?

Thanks in advance.