Question

I’m trying to use Jquery to have scroll on a UL list, with two span to move up and down.
it works for one li child, but how for an ul filled dynamically ?
thank you, i’m totally lost

 $('span.scrollDown').click(function () {
        $('.liste-grostitres li:first-child').css('margin-top', 0 - $('.liste-grostitres li').outerHeight());
        $('.liste-grostitres').css('overflow', 'hidden');
    });

    $('span.scrollUp').click(function () {
        $('.liste-grostitres li:first-child').css('margin-top', 0);
        $('.liste-grostitres').css('overflow', 'visible');
    });


<div id="grostitres">
    <div class="gInner">
    <span class="scrollUp"></span>
    <span class="scrollDown"></span>
    <div class="scrollable" id="divlist" runat="server">   
      <ul>
          <li></li>
          <li></li>
          ...
      </ul>
    </div>              
    </div>

Answer 1

heres a fiddle with slidetoggle:
http://jsfiddle.net/RMQLM/

also the working code example:

HTML:

<div id="up">up</div>
<div id="list">
<ul>
    <li>foo1</li>
    <li>bar1</li>
    <li>foo2</li>
    <li>bar2</li>
    <li>foo3</li>
    <li>bar3</li>
    <li>foo4</li>
    <li>bar4</li>
    <li>foo5</li>
</ul>
</div>
<div id="down">down</div>

CSS:

div#list {
    height: 93px;
    overflow: hidden;
    border: 1px solid red;
}

jQuery:

var listcount = $('li').size();
var cli = 1;
$('#down').click(function() {
    if (cli < listcount) {
        $('li:nth-child(' + cli + ')').slideToggle();
        cli++;
    }
});
$('#up').click(function() {
    if (cli > 1) {
        cli--;
        $('li:nth-child(' + cli + ')').slideToggle();
    }
});