Problem mit zusätzlichem Javascript

Code:
<link rel="shortcut icon" href="/images/favicon.ico">

<link rel="icon" href="/images/favicon.ico" type="image/ico" />



<div id="container">

        <a name="top" id="top"></a>

        <div id="header">

            <div class="logo"><a href="http://www.eishockeyfanpage-leipzig.de/" target="_blank"><img src="{$theme['logo']}" alt="{$mybb->settings['bbname']}" title="{$mybb->settings['bbname']}" /></a></div>

<link rel="stylesheet" type="text/css" media="screen" href="{$mybb->settings['bburl']}/images/imagemenu/imageMenu.css">

<script type="text/javascript" src="{$mybb->settings['bburl']}/images/imagemenu/mootools.js"></script>

<script type="text/javascript" src="{$mybb->settings['bburl']}/images/imagemenu/imageMenu.js"></script>

<div id="imageMenu" align="center">

            <ul>

                <!-- THESE AR ETHE LINKS YOU GO TO WHEN YOU CLICK ON A SLIDING DOOR IMAGE-->

                <!-- change the href to look like this: <a href="yourlink.com">     -->

                <li class="bk1"><a href="{$mybb->settings['bburl']}/search.php">Suche</a></li>

                <li class="bk2"><a href="{$mybb->settings['bburl']}/memberlist.php">Mitglieder</a></li>

                <li class="bk3"><a href="{$mybb->settings['bburl']}/calendar.php">Kalender</a></li>

                <li class="bk4"><a href="{$mybb->settings['bburl']}/misc.php?action=help">Hilfe</a></li>

                <li class="bk5"><a href="{$mybb->settings['bburl']}/portal.php">Portal</a></li>

                <li class="bk6"><a href="{$mybb->settings['bburl']}/misc.php?action=impressum">Impressum</a></li>

                                                <li class="bk7"><a href="" onclick="window.open('http://www.forum.eishockeyfanpage-leipzig.de/chat/'); return false;">Chat</a></li>

                                                <li class="bk8"><a href="" onclick="window.open('http://www.eishockeyfanpage-leipzig.de/?page_id=579'); return false;">Tippspiel</a></li>

                                                <li class="bk9"><a href="" onclick="window.open('http://www.eishockeyfanpage-leipzig.de/?page_id=645'); return false;">Ergebnisse</a></li>

                                                <li class="bk10"><a href="" onclick="window.open('http://www.eishockeyfanpage-leipzig.de/liveticker/index.php?id=6'); return false;">Liveticker</a></li>

                                                <li class="bk11"><a href="" onclick="window.open('http://www.young-lions-leipzig.de/'); return false;">Young Lions</a></li>

            </ul>

            </div>

        

<script type="text/javascript">

            

            window.addEvent('domready', function(){

                var myMenu = new ImageMenu($$('#imageMenu a'),{openWidth:310, border:2, onOpen:function(e,i){location=(e);}});

            });

        </script>

<!--            <div class="menu">

                <ul>

                    <li><a href="{$mybb->settings['bburl']}/search.php"><img src="{$mybb->settings['bburl']}/{$theme['imgdir']}/toplinks/search.gif" alt="" title="" />{$lang->toplinks_search}</a></li>

                    <li><a href="{$mybb->settings['bburl']}/memberlist.php"><img src="{$mybb->settings['bburl']}/{$theme['imgdir']}/toplinks/memberlist.gif" alt="" title="" />{$lang->toplinks_memberlist}</a></li>

                    <li><a href="{$mybb->settings['bburl']}/calendar.php"><img src="{$mybb->settings['bburl']}/{$theme['imgdir']}/toplinks/calendar.gif" alt="" title="" />{$lang->toplinks_calendar}</a></li>

                    <li><a href="{$mybb->settings['bburl']}/misc.php?action=help"><img src="{$mybb->settings['bburl']}/{$theme['imgdir']}/toplinks/help.gif" alt="" title="" />{$lang->toplinks_help}</a></li>

<li class="portallink_link"><a href="{$mybb->settings['bburl']}/portal.php"><img src="{$theme['imgdir']}/toplinks/portal.gif" border="0" alt="" />Portal</a></li>

<li class="impressum_link"><a href="{$mybb->settings['bburl']}/misc.php?action=impressum"><img src="{$theme['imgdir']}/toplinks/impressum.gif" border="0" alt="" />Impressum</a></li>

<li><a href="http://www.forum.eishockeyfanpage-leipzig.de/chat/"" target="_blank"><img src="{$mybb->settings['bburl']}/{$theme['imgdir']}/toplinks/chat.gif" alt="Chat" title="Chat">Chat</a></li>

                </ul>

            </div> -->

            <hr class="hidden" />

            <div id="panel">

                {$welcomeblock}

            </div>

        </div>

        <hr class="hidden" />

        <br class="clear" />

        <div id="content">

            {$pm_notice}

            {$bannedwarning}

            {$bbclosedwarning}

            {$unreadreports}

                                    {$boardmsg}

            <navigation> {$globalmsg}

            <br />