Mail form with attachement & thank you - popup window

Dear Sir,

I have a mail form ( file name: sendresults ) in php. This php code supports the sending all text of the checkboxes of Register Page of a website. But it does't send attachement ( word, excel, jpg, image, etc. )

Now , I want to add the attachement code and a javascript of "thank you" pop-up window in the script I am using.

My code is as under:

<?php
 //--------------------------Set these paramaters--------------------------
 
// Subject of email sent to you.
 $subject = 'Test mail'; 

// Your email address. This is where the form information will be sent. 
//$emailadd = 'career@icfa.co.in'; 
$emailadd = 'basu.biswas@gmail.com';

// Where to redirect after form is processed. 
$url = 'http://www.icfa.co.in/register.php'; 

// Makes all fields required. If set to '1' no field can not be empty. If set to '0' any or all fields can be empty.
 $req = '1'; 

// --------------------------Do not edit below this line--------------------------
 $text = "Results from form:\n\n"; 
$space = ' ';
 $line = '
 ';
 foreach ($_POST as $key => $value)
 {
 if ($req == '1')
 {
 if ($value == '')
 {echo "$key is empty";die;}
 }
 $j = strlen($key);
 if ($j >= 20)
 {echo "Name of form element $key cannot be longer than 20 characters";die;}
 $j = 20 - $j;
 for ($i = 1; $i <= $j; $i++)
 {$space .= ' ';}
 $value = str_replace('\n', "$line", $value);
 $conc = "{$key}:$space{$value}$line";
 $text .= $conc;
 $space = ' ';
 }
 mail($emailadd, $subject, $text, $attachement, 'From: '.$emailadd.'');
 echo '<META HTTP-EQUIV=Refresh CONTENT="0; URL='.$url.'">';
 // send the message 

 // mail("$to_name <$to_email>", $subject, $message, $headers);  

if (
mail("$to_name <$to_email>", $subject, $message, $headers);  
) {
  echo '<p>Send successfully!</p>';
} else {
  echo '<p>Bah!</p>';
}
  print "Mail sent.  Thank you for using ICFa web Mailer."; 
    
  echo '("<script language = 'javascript'>window.alert('Mail sent Successfully !')</script>")';
 ?>

pl. help with attachement code of any file and a javascript of "thank you" pop-up window.

thanks in adv.

roy