eq: select by index : eq « jQuery « JavaScript Tutorial

<html>
  <head>
    <script type='text/javascript' src='js/jquery-1.3.2.js'></script>
    <script type='text/javascript'>
var tmpExample = {
  ready : function() {
    $('ul li').eq(3).addClass('justAdd');
  }
};

$(document).ready(tmpExample.ready);
    </script>
    <style type='text/css'>

ul {
    list-style: none;
    margin: 0;
    padding: 0;
}
ul li {
    margin: 1px;
    padding: 3px;
}
li.justAdd {
    background: #cdb6ed;
}
    </style>
  </head>
  <body>
    <ul>
      <li>A</li>
      <li>B</li>
      <li>C</li>
      <li>D</li>
    </ul>
  </body>
</html>

30.35.eq
	30.35.1.	Reduce the set of matched elements to a single element
	30.35.2.	eq(index) returns the element position in matched elements starts at 0 and goes to length - 1.
	30.35.3.	Reduces the selection to the second selected element.
	30.35.4.	eq: select by index