Jquery and AJAX with ASP

////////////(This is the .js file)
 
 $(document).ready(function() {
   // generate markup
   $("#rating").append("Please rate: ");
   
   for ( var i = 1; i <= 5; i++ )
     $("#rating").append("<a href='#'>" + i + "</a> ");
   
   // add markup to container and apply click handlers to anchors
   $("#rating a").click(function(e){
     // send request
     $.post("rate.php", {rating: $(this).html()}, function(xml) {
       // format and output result
       $("#rating").html(
         "Thanks for rating, current average: " +
         $("average", xml).text() +
         ", number of votes: " +
         $("count", xml).text()
       );
     });
     
     // stop normal link click
     return false;
   });
 });
 
 
 
 
///////////////(this is the php file)
 
 
 
<?php
 
define('STORE', 'ratings.dat');
 
function put_contents($file,$content) {
	$f = fopen($file,"w");
	fwrite($f,$content);
	fclose($f);
}
 
if(isset($_REQUEST["rating"])) {
	/$rating = $_REQUEST["rating"];
	$storedRatings = unserialize(file_get_contents(STORE));
	$storedRatings[] = $rating;
	put_contents(STORE, serialize($storedRatings));
	$average = round(array_sum($storedRatings) / count($storedRatings), 2);
	$count = count($storedRatings);
	$xml = "<ratings><average>$average</average><count>$count</count></ratings>";
	header('Content-type: text/xml'); 
	echo $xml;
}
 
?>