div.container{
margin:30px auto;
width:350px;
}
h2{ margin:0px;
padding:0px;
border:0px;
}
h2{ color:#FFFFFF;
font-size:13px;
display:block;
background:url(h2_bg.gif) top left no-repeat #9A9A9A;
}
h2 span{
padding:5px 10px;
background:url(h2_span_bg.gif) top right no-repeat;
display:block;
}
h2 a:link, h2 a:visited{
color:#FFFFFF;
text-decoration:none;
display:block;
}
#section {
background:url(section_bg_left.png) bottom left no-repeat #EEEEEE;
font-size:12px;
}
#section div{
background:url(section_bg_right.png) right bottom no-repeat;
padding:10px;
}

<script type="text/javascript" src="http://cnetjavascript.googlecode.com/files/mootools.svn.js"></script>

<script type="text/javascript">
window.addEvent('domready', function(){
var mySlide = new Fx.Slide('section');
$('toggle').addEvent('click', function(e){
e = new Event(e);
mySlide.toggle();
e.stop();
});
});
</script>

<div class="container">

<h2><span><a href="#" id="toggle">Tiêu đề của tab</a></span></h2>

<div id="section">
<div>

...
{Nội dung của tab}
...

</div>
</div>
</div>