【children_index】
<!DOCTYPE html>
<html>
<head>
<script type='text/javascript'
src='http://code.jquery.com/jquery-1.6.3.js'></script>
<script type='text/javascript'>
$(window).load(function(){
$('.selectorForElement:not(:eq(1))').hide();
});
</script>
</head>
<body>
<div class="selectorForElement">1</div>
<div class="selectorForElement">2</div>
<div class="selectorForElement">3</div>
<div class="selectorForElement">4</div>
</body>
</html>
