ScrollTo would help, but is scrolling absolutely required? I think it's even better to just use slideUp()
and slideDown()
I modified the HTML just a bit to give the slide items a class and an id.
Live Demo: http://jsfiddle.net/ztFWv/1/
<div id="slider">
<ul>
<li id="one" class="slideItem">
<h1>Header #1</h1>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nunc dictum, ante a lacinia pharetra, ligula augue vestibulum urna, gravida placerat odio ipsum eget augue.</p>
</li>
<li id="two" class="slideItem">
<h1>Header #2</h1>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nunc dictum, ante a lacinia pharetra, ligula augue vestibulum urna, gravida placerat odio ipsum eget augue.</p>
</li>
<li id="three" class="slideItem">
<h1>Header #3</h1>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nunc dictum, ante a lacinia pharetra, ligula augue vestibulum urna, gravida placerat odio ipsum eget augue.</p>
</li>
</div>
<a href="javascript:void(0);" class="one">Scroll to #1</a>
<a href="javascript:void(0);" class="two">Scroll to #2</a>
<a href="javascript:void(0);" class="three">Scroll to #3</a>
JS
$('a').click(function(){
var linkClass=$(this).attr('class');
$('.slideItem:visible').slideUp('fast',function(){
$('#' + linkClass).slideDown('fast');
});
});
UPDATE
If you must have scrolling :)
Here is a sample: http://jsfiddle.net/ztFWv/3/
Include the scrollTo JS file and use the command this way.
$('a').click(function(){
$('#slider').scrollTo( $('#' + $(this).attr('class')), 800 );
});