使用Internet Explorer的setTimeout位置

Question

i try to reload the page after click on button

1- Click on button 2- Little message appear: "well done" 3- Refresh the page after 2 seconds

My code work fine except with internet explorer. Can you help me please

<form method="post" action="">
<button type="image" src="../../images/favoris.png"  class="ajouter"      value="ajouter" name="ajouter"></button> 
</form> 

<?php

if (isset($_POST['ajouter']) ) 
{
$sql = "INSERT INTO favoris (id, client) VALUES('','$pseudo')";
mysql_query($sql) or die('Erreur SQL ! '.$sql.'<br>'.mysql_error());

echo 'well done
<script type="text/javascript"> 
window.setTimeout("location=(\'\');",2000) 
</script>';
}

Thanks