How make li elements slide down and up?

Question

I have

elements in a

and I want them expand down and up and each element should expand down and up.

HTML:

Answer 1

How about this? http://jsfiddle.net/StartStep/5svS8/ The problem was with overflow: hidden and jquery selector

$('.expand').click(function(){
    $(this).parent('.answer').css({'height':'auto','overflow':'scroll'});  
})