i have a \"ul\" that contains lots of \"li\" (several hundred), the ul has a fixed hight of about 400px and the css property overflow:scroll, each li has the height of 40px
I got close using @lonesomeday's answer, but I found that I had to calculate the relative position of the specific li from the first li because it changed depending on the current scroll position of the containing ul.
$('#yourUL').scrollTop($('#yourUL li:nth-child(14)').position().top - $('#yourUL li:first').position().top)