'null' is null or not an object problem - please help

'null' is null or not an object problem - please help

Hi,

I'm hoping someone can help me with this - I'm very new to javascript and quite stumped.

I'm getting this error msg on ie8


Webpage error details

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET4.0C)
Timestamp: Thu, 31 Mar 2011 13:14:57 UTC


Message: 'null' is null or not an object
Line: 156
Char: 31
Code: 0
URI: http://www.carlmarmedia.com/soon/


Have tracked it down to this js - can anyone see any problems with it?



<!--jquery Main library --> <script language="JavaScript" type="text/javascript" src="<?php echo $this->baseurl ;?>/templates/<?php echo $this->template ;?>/js/jsuperfish/jquery-1.2.6.min.js"></script> <!--hoverIntent--> <script language="JavaScript" type="text/javascript" src="<?php echo $this->baseurl ;?>/templates/<?php echo $this->template ;?>/js/jsuperfish/hoverIntent.js.js"></script> <!--superfish--> <script language="JavaScript" type="text/javascript" src="<?php echo $this->baseurl ;?>/templates/<?php echo $this->template ;?>/js/jsuperfish/superfish.js"></script> <!--Menu css-->  <link href="<?php echo $this->baseurl ;?>/templates/<?php echo $this->template ;?>/js/jsuperfish/superfish.css" rel="stylesheet" type="text/css" />    <!-- javascript init --> <script type="text/javascript"> $(document).ready(function(){$('ul.sf-menu').superfish();});    </script>



Thanks for any help