error with update panel

<script src="Scripts/ddaccordion.js" type="text/javascript"></script> <script type="text/javascript"> ddaccordion.init({ headerclass: "silverheader", //Shared CSS class name of headers group contentclass: "submenu", //Shared CSS class name of contents group revealtype: "mouseover", //Reveal content when user clicks or onmouseover the header? Valid value: "click", "clickgo", or "mouseover" mouseoverdelay: 200, //if revealtype="mouseover", set delay in milliseconds before header expands onMouseover collapseprev: true, //Collapse previous content (so only one open at any time)? true/false defaultexpanded: [0], //index of content(s) open by default [index1, index2, etc] [] denotes no content onemustopen: true, //Specify whether at least one header should be open always (so never all headers closed) animatedefault: false, //Should contents open by default be animated int ...