AJAX: PHP query doesn't refresh when called - php

Question

I got a page where a table is supposed to reload when I click a link. The script works, and the variable is updated (I've tested that, see code), but the table doesn't reload with new data from the SQL query.
Page
<!-- SCRIPT START -->
<script type='text/javascript'>
function getResultat(str) {
if (str == "") {
document.getElementById("txtHint").innerHTML = "";
return;
} else {
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
} else {
// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
document.getElementById("txtHint").innerHTML = xmlhttp.responseText;
}
}
xmlhttp.open("GET","getResultat.php?klasse2="+str,true);
xmlhttp.send();
}
}
</script>
<!-- SCRIPT END -->
<!-- LINK -->
<a style="cursor:pointer" onclick='javascript:getResultat("KSenior")'> KSenior </a>
<!-- DATA get inserted here -->
<div id="txtHint"><?php include("getResultat.php"); ?></div><br>
getResultat.php
<?php
if(isset($_REQUEST['klasse2'])) {
$klasse2=$_REQUEST['klasse2'];
// Used to check if variable updates (for debuging only)
echo $klasse2;
$klasse2= $_REQUEST['klasse2'];
} else {
$klasse2="MSenior";
// Used to check if variable updates (for debuging only)
echo $klasse2;
}
$query = "SELECT DISTINCT *
FROM resultat
WHERE resultat.klasse = '$klasse2'
ORDER BY resultat.plassering ASC ";
// THIS SEND THE QUERY TO A CRUD
$selection= array("plassering", "navn","lagnavn", "tid_liten");
$records_per_page=5;
$newquery = $crud->paging($query,$records_per_page);
$crud->dataview($newquery, $selection, $records_per_page, $sesong, $bestetid['tid_ny']);
?>
I can post the CRUD if needed, but hopefully there is some common mistake I'm making?
When calling this page with a button the echo in the start reloads, but not the query.