How to find nth row of table using jQuery?

$(document).ready(function(){
$(“table tr:eq(3)).css(“background”,”#000″);
}) ;

$(‘li:nth-child(1)’) selects the first
while $(‘li:eq(1)’) selects the second.

Because jQuery’s implementation of :nth-child(n) is strictly derived from the CSS specification, the value of n is “1-indexed”, meaning that the counting starts at 1. For all other selector expressions, however, jQuery follows JavaScript’s “0-indexed” counting.