Download following file and add it to aspx markup code
<script type="text/javascript" src="../js/jquery-ui-1.8.23.custom.min.js"></script>
add javascript
<script language="javascript" type="text/javascript">
$(function () {
$("#accordion").accordion();
});
</script>
Add div in code like this
<div id="Divaccordion" class="ui-accordion ui-accordion-header" runat="server">
<div id="Divhead1" runat="server">
<h3 id="H1" runat="server">
head1</h3>
</div>
<div id="Divhead2" runat="server">
<h3 id="H2" runat="server">
head2</h3>
</div>
<div id="Divhead3" runat="server">
<h3 id="H3" runat="server">
head3</h3>
</div>
<div id="Divhead4" runat="server">
<h3 id="H4" runat="server">
head4</h3>
</div>
<div id="Divhead5" runat="server">
<h3 id="H5" runat="server">
head5</h3>
</div>
</div>
give div id "Divaccordion" in javascript after #