Javascript command to close a VBmenu

[carcomp]

What would be the command to close a vbmenu from an onclick event?

Here is my code below where the command should be.

<script type="text/javascript"> vbmenu_register("MyMENU_$post[postid]");</script>
        </td>
    </tr>
    </table>
    <!-- end vBMenu control element -->
    
    <!-- start vBMenu popup element -->
    <div class="vbmenu_popup" id="MyMENU_$post[postid]_menu" style="display:none">
        <table cellpadding="4" cellspacing="1" border="0">
        <tr>
            <td class="thead">Send a PM</td>
        </tr>
        <tr>
            <td>
<DIV>              

<form id="quickpm$post[postid]" action="http://www.quad4forums.com/forums/private.php" >

<TEXTAREA name="message" rows="3" cols="30"></TEXTAREA>

<input type="hidden" class="bginput" name="recipients" id="recipients" value="$post[username]">
<input type="hidden" class="bginput" name="title" id="title" value="You have received an ExpressPM from $bbuserinfo[username]">
<input type="hidden" name="do" id="do" value="insertpm">
<input type="hidden" name="pmid" id="pmid" value="">
<input type="hidden" name="forward" id="forward" value="">
<input type="hidden" name="receipt" id="receipt" value="0">	
<P><center><a href="#" onclick="$('quickpm$post[postid]').request({
  onComplete: function(){ alert('PM has been sent to $post[username]!') }
}); return false;">Submit</a></center>
</form>

</DIV>
            </td>
        </tr>
                </table>
    </div>
    <!-- end vBMenu popup element -->

In that onclick even, I want the vbmenu to close itself out, but I can't quite figure out how to do it.

Thanks.