When IE load the site first time after the clicking on element must script to work, but appears the notification window "The object does not support this property or a method. Code 0. String 123, symbol 183 in jquery-1.4.2.min.js"

If I made page reloading - script start to work normally.

So, how I can solve this trouble?

Simple code:

<li onclick="ask_kat ('FHCTF', 'kuhen_fltr')

In head I connect:

<SCRIPT language="javascript" src="./scr/jquery-1.4.2.min.js" type="text/javascript"></script>

Body of the function "ask_kat":

function ask_kat (A, P) {

$.ajax({

type: "POST",

url: "php/fragen.php",

cash: true,

data: {produkt:A, table:P},

success: function(html){

$("#Center").html(html);

}

}); }

Body of the fragen.php:

<?php

$kat.=$_POST['produkt'];

$tbl.=$_POST['table'];

print $kat."<br>";

print $tbl;

?>