Sequential CSS3 animation - animation

Question

I'm wondering if it is possible to fade in a list of items sequentially using CSS3 only?
HTML would be something like this:
<ul>
<li>item 1</li>
<li>item 2</li>
<li>item 3</li>
<li>item 4</li>
<li>item 5</li>
<li>item 6</li>
<li>item 7</li>
<li>item 8</li>
<li>item 9</li>
<li>item 10</li>
<li>item 11</li>
<li>item 12</li>
<li>item 13</li>
<li>item 14</li>
<li>item 15</li>
</ul>
And when the UL gets the class "fadeout" it would be cool if first "item1" fades out (during 2 seconds) once this is finished fade out the next one("item2") and so on until all items are faded out.
I know how to do this using jQuery but it would be nice if this was possible using CSS3 only? Any ideas if this could be possible?
EDIT: I'm really looking for a solution that also works when you don't know how many items are in the list. it could be 1 it could be a 100?
EDIT: Apparently making this for a variable amount of elements is impossible using CSS only, so the best CSS solution is for a fixed number of items. Otherwise you will have to use JS.
Thx for the responses!

Answer 1

This would work:
HTML:
<ul class="fadeout">
<li>item 1</li>
<li>item 2</li>
<li>item 3</li>
</ul>
CSS:
ul.fadeout li:nth-child(1){
-webkit-animation: fadeOut 2s linear forwards;
}
ul.fadeout li:nth-child(2){
-webkit-animation: fadeOut 2s linear 2s forwards;
}
ul.fadeout li:nth-child(3){
-webkit-animation: fadeOut 2s linear 4s forwards;
}
ul.fadeout li:nth-child(1){
-webkit-animation: fadeOut 2s linear forwards;
}
#-webkit-keyframes fadeOut {
0% { opacity: 1; }
100% { opacity: 0; }
}
http://jsfiddle.net/fGAZr/

Answer 2

This is something I wouldn't recommend, as with all the vendor extensions it would get extremely verbose. It would be possible to auto-generate the code with scss, but I wouldn't bother.
ul li { transition: opacity 200ms linear;}
ul.fadeout li {opacity: 0;}
ul.fadeout li:nth-child(1) { transition-delay: 0 }
ul.fadeout li:nth-child(2) { transition-delay: 0.1s }
ul.fadeout li:nth-child(3) { transition-delay: 0.2s }
ul.fadeout li:nth-child(4) { transition-delay: 0.3s }
ul.fadeout li:nth-child(5) { transition-delay: 0.4s }
ul.fadeout li:nth-child(6) { transition-delay: 0.5s }
ul.fadeout li:nth-child(7) { transition-delay: 0.6s }
ul.fadeout li:nth-child(8) { transition-delay: 0.7s }
ul.fadeout li:nth-child(9) { transition-delay: 0.8s }
ul.fadeout li:nth-child(10) { transition-delay: 0.9s }
ul.fadeout li:nth-child(11) { transition-delay: 1s }
ul.fadeout li:nth-child(12) { transition-delay: 1.1s }
ul.fadeout li:nth-child(13) { transition-delay: 1.2s }
ul.fadeout li:nth-child(14) { transition-delay: 1.3s }
ul.fadeout li:nth-child(15) { transition-delay: 1.4s }
You can view a webkit only example here: http://jsfiddle.net/kUQj7/