Hi, sorry for my english, I need help with a script please.

I have a star rating script on my website, that work fine on firefox and safari but but on IE.

My html:
HTML Code:
<script type="text/javascript" src="loco/rate-product-ajax.js"></script>
<form>
  <input class="star rate" type="radio" name="rate" value="1" />
  <input class="star rate" type="radio" name="rate" value="2" />
  <input class="star rate" type="radio" name="rate" value="3" />
  <input class="star rate" type="radio" name="rate" value="4" />
  <input class="star rate" type="radio" name="rate" value="5" />
</form>
I call two files:

HTML Code:
<script src="http://code.jquery.com/jquery-latest.js"></script>
<script type="text/javascript" src="loco/jquery.rating.js"></script>
rate-product-ajax.js

Code:
$(document).ready(function() {
						   
var some_product_id=77;
 //let's say it's product with id=1, if you have application you will change this variable programatically

getRating(some_product_id);

function getRating(id){
	$.ajax({
		type: "GET",
		url: "loco/rate-product.php",
		dataType : 'json',
		processData: false,
		data: "do=getRate&product_id=" + id,
		cache: false,
		async: false,
		success: function(result) {
			avg=result.avg;
			sum=result.count;
			$("#votes").html;
			$(".vote_count").html(sum + " vote(s)");
			$('.rate').rating('select',avg);
		},
		error: function(jqXHR, textStatus, errorThrown) { 
    alert(textStatus+' - '+errorThrown);
		}
	});
}

$('.rate').click(function(){
	$.ajax({
		type: "GET",
		url: "loco/rate-product.php",
		dataType : 'json',
		data: "do=rate&product_id=" + some_product_id + "&rate="+$(this).text(),
		cache: false,
		async: false,
		success: function(result) {
			avg=result.avg;
			sum=result.count;
			$("#votes").html("Average:" + avg);
			$(".vote_count").html(sum + " vote(s)");
			$('.rate').rating('select',avg);
			$('input',this.form).rating('readOnly',true);
			//$('input',this.form).rating('disabled',true);
			//$('input',this.form).rating('return',false);
			$('.rate').unbind('click');
			
		},
		error: function(jqXHR, textStatus, errorThrown) { 
    alert(textStatus+' - '+errorThrown);
		}
	});
});
});
My php file

Code:
function getRate() {
	$sql= "select ifnull(round(sum(rate)/count(*),0),0) avg, count(*) count from rate where product_id=" . $_GET['product_id'];
	if($result=mysql_query($sql)) {
		if($row=mysql_fetch_array($result)) {
			$rate['avg'] = $row['avg'];
			$rate['count'] = $row['count'];
			echo json_encode($rate);
		}
	}
}


/* $ip = $_SERVER["REMOTE_ADDR"];
	
	$product = $_GET['product_id'];
	$valideip = "SELECT * FROM  rate WHERE ip = '$ip' AND product_id = '$product' ";

	$row_ip = mysql_num_rows($valideip);
	
	if($row_ip < 1)
*/


// function to insert rating
function rate() {
	$ip = $_SERVER["REMOTE_ADDR"];
	
	$product = $_GET['product_id'];
	$valideip = "SELECT * FROM  rate WHERE ip = '$ip' AND product_id = '$product' ";
	
	$sql = "insert into rate (product_id, rate, ip) values (" . $_GET['product_id'] . ", ".$_GET['rate'].",'$ip')";
	
	if($result=mysql_query($sql)) {
		getRate(); //call retrieve from getRate function
	}
}



if(!empty($_GET['do'])) {
	include 'config.php';
	include 'opendb.php';  //open database connection
	
	if($_GET['do']=='rate'){
		// do rate
		rate();
	}
	else if($_GET['do']=='getRate'){
		// get rating
		getRate();
	}
}
On Internet explorer an error appear: parsererror undefined I don't know if the script can open rate-product.php.