You should remove the oninit and onopenclose event handlers from your initialization code, as you're not populating any IFRAME at the same time. In other words, you should end up with just:
Code:
<script type="text/javascript">
ddaccordion.init({
headerclass: "submenuheader", //Shared CSS class name of headers group
contentclass: "submenu", //Shared CSS class name of contents group
revealtype: "click", //Reveal content when user clicks or onmouseover the header? Valid value: "click" or "mouseover
collapseprev: false, //Collapse previous content (so only one open at any time)? true/false
defaultexpanded: [], //index of content(s) open by default [index1, index2, etc] [] denotes no content
onemustopen: false, //Specify whether at least one header should be open always (so never all headers closed)
animatedefault: false, //Should contents open by default be animated into view?
persiststate: true, //persist state of opened contents within browser session?
toggleclass: ["", ""], //Two CSS classes to be applied to the header when it's collapsed and expanded, respectively ["class1", "class2"]
togglehtml: ["suffix", "<img src='images/plus.gif' class='statusicon' />", "<img src='images/minus.gif' class='statusicon' />"], //Additional HTML added to the header when it's collapsed and expanded, respectively ["position", "html1", "html2"] (see docs)
animatespeed: "normal" //speed of animation: "fast", "normal", or "slow"
})
</script>
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