1. Log in to your dashboard--> layout- -> Edit HTML

2. Click on "Expand Widget Templates"

3. Search "Ctrl+F" and find </head>.Right before it paste the next code:

<script type="text/javascript" src="http://descarca.googlecode.com/files/jquery.js"></script>

<script type="text/javascript">
$(document).ready(function(){
 
 $(".accordion2 h3").eq(2).addClass("active");
 $(".accordion2 p").eq(2).show();

 $(".accordion2 h3").click(function(){
  $(this).next("p").slideToggle("slow")
  .siblings("p:visible").slideUp("slow");
  $(this).toggleClass("active");
  $(this).siblings("h3").removeClass("active");
 });

});
</script>

4. Now find ]]></b:skin> and before it add the following code:

<style type="text/css">
body {
 margin: 10px auto;
 width: 570px;
 font: 75%/120% Arial, Helvetica, sans-serif;
}
.accordion2 {
 width: 480px;
 border-bottom: solid 1px #c4c4c4;
}
.accordion2 h3 {
 background: #e9e7e7 url('http://img547.imageshack.us/img547/9669/arrowsquare.gif') no-repeat right -51px;
 padding: 7px 15px;
 margin: 0;
 font: bold 120%/100% Arial, Helvetica, sans-serif;
 border: solid 1px #c4c4c4;
 border-bottom: none;
 cursor: pointer;
}
.accordion2 h3:hover {
 background-color: #e3e2e2;
}
.accordion2 h3.active {
 background-position: right 5px;
}
.accordion2 p {
 background: #f7f7f7;
 margin: 0;
 padding: 10px 15px 20px;
 border-left: solid 1px #c4c4c4;
 border-right: solid 1px #c4c4c4;
 display: none;
}
</style>

5. Now go to Layout-->Page Element and click on "Add a gadget". Select "html/java script" and add the code given below and click save.

<div class="accordion2">
 <h3>Question One Sample Text</h3>
 <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Morbi malesuada, ante at feugiat tincidunt, enim massa gravida metus, commodo lacinia massa diam vel eros. Proin eget urna. Nunc fringilla neque vitae odio. Vivamus vitae ligula.</p>
 <h3>This is Question Two</h3>
 <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Morbi malesuada, ante at feugiat tincidunt, enim massa gravida metus, commodo lacinia massa diam vel eros. Proin eget urna. Nunc fringilla neque vitae odio. Vivamus vitae ligula.</p>
 <h3>Another Questio here</h3>
 <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Morbi malesuada, ante at feugiat tincidunt, enim massa gravida metus, commodo lacinia massa diam vel eros. Proin eget urna. Nunc fringilla neque vitae odio. Vivamus vitae ligula.</p>
 <h3>Sample heading</h3>
 <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Morbi malesuada, ante at feugiat tincidunt, enim massa gravida metus, commodo lacinia massa diam vel eros. Proin eget urna. Nunc fringilla neque vitae odio. Vivamus vitae ligula.</p>
 <h3>Sample Question Heading</h3>
 <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Morbi malesuada, ante at feugiat tincidunt, enim massa gravida metus, commodo lacinia massa diam vel eros. Proin eget urna. Nunc fringilla neque vitae odio. Vivamus vitae ligula.</p>
</div>

Change the dummy text with your own.