jQuery Plugin Boxy, before boxy loading

In vBulletin version 4.1.4, to open a window with attachments, I use the jQuery Plugin, Boxy . It is in the template, threadbit and is working fine. But when the box is loading, I want to show an image that something is happening. After the loading process, this image should be removed. For this process I modified the template code.

This works:

<code class="html">
    <div class="myThemaRating" style="cursor:pointer;">
        <span onclick='new Boxy.load( "{vb:raw vboptions.bburl}/misc.php?{vb:raw session.sessionurl}do=showattachments&amp;t={vb:raw thread.threadid}", {title:"Anhang-Dateien im Forum:", closeText:"schliessen", cache:true} )'>
            <i m g s_c="{vb:stylevar i m g dir_icons}/Icon_6 . png" border="0" alt="{vb:rawphrase x_attachments, {vb:raw thread.attach}}" />&nbsp;
        </span>
    </div>
</code>

But this doesn't:

<code>    
    <div class="myThemaRating" style="cursor:pointer;">
        <span onclick='new Boxy.load( "{vb:raw vboptions.bburl}/misc.php?{vb:raw session.sessionurl}do=showattachments&amp;t={vb:raw thread.threadid}", {title:"Anhang-Dateien im Forum:", closeText:"schliessen", cache:true }, behaviours:function(r) { $(r).click( $("# myImagesLoad _{vb:raw thread.threadid}").attr({ src: "{vb:stylevar开发者_JAVA技巧 i m g dir_icons}/ajax-loader . gif", alt: "Fenster wird geladen" }) ); } }  ' >
            <i m g s_c="{vb:stylevar imgdir_icons}/1pixel . png" id="myImagesLoad_{vb:raw thread.threadid}" width="10" border="1"> <!-- load image -->
            <i m g s_c="{vb:stylevar imgdir_icons}/Icon_6 . png" border="0" alt="{vb:rawphrase x_attachments, {vb:raw thread.attach}}" />&nbsp;
        </span>
    </div>
</code>

Does anybody have an idea how I can fix this?