<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
<script type="text/javascript" src="jquery/jquery-1.11.1.js"></script>
<script type="text/javascript">
$(function(){
//选择class为one下的所有的隐藏的子元素(这个是先选class="one"的元素,然后再选隐藏的(是class=one的子元素))
alert($(".one :hidden").length);
//选择隐藏为class等于one的元素(先选隐藏的,再选class=”one“的元素)
alert($(".one:hidden").length);
});
</script>
</head>
<body>
<div style="display:block;" class="one">1111111111111111111</div>
<div style="display: none;" class="one">1111111111111111111</div>
<div style="display: none;" class="one">1111111111111111111</div>
<div class="one">
<div style="display: none;">1111111111111111111</div>
<div style="display: none;">1111111111111111111</div>
<div style="display: none;">1111111111111111111</div>
<div style="display: none;">1111111111111111111</div>
<div style="display: none;">1111111111111111111</div>
<div style="display: none;" class="one">1111111111111111111</div>
</div>
</body>
</html>