si necesitas JS :
JS
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.js" type="text/javascript"></script>
<script type="text/javascript">
 
$(document).ready(function(){
 
        $(".slidingDiv").hide();
        $(".show_hide").show();
 
    $('.show_hide').click(function(){
    $(".slidingDiv").slideToggle();
    });
 
});
 
</script>
HTML
<a href="#" class="show_hide">Show/hide</a>
<div class="slidingDiv">
Fill this space with really interesting content. <a href="#" class="show_hide">hide</a></div>
Gracias a: 
Simple jQuery