第一、層次選擇器
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>"><title>JQuery DEMO</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<style type="text/css">
div{
width:250px;
height:100px;
border:1px solid blue;
float:left;
padding:10px;
}
span{
margin:3px;
border:1px solid red;
padding:5px;
}
h1,h2{
display:inline;
}
</style>
<!--引入 jquery.js 文件-->
<script type="text/javascript" src="js/jquery/jquery-1.3.2.js">
</script>
<script type="text/javascript">
$(function(){
//選取div中所有的span元素樣式
$("div span").css("background","yellow");
//選取div下元素是span元素樣式
$("div>span").css("background","blue");
//選取id爲sp1的下一個span元素
// $("#sp1 + span").css("border","3px solid black");
//等價於
$("#sp1").next("span").css("border","3px solid black");
//選取id爲div1的所有兄弟span元素
$("#div1 ~ span").css("background","#eeeeee");
//等價於
// $("#div1").nextAll("span").css("background","#eeeeee");
//不同於 siblings 與前後位置無關
$("#div1").siblings("span").css("background","#113344");
});
</script>
</head>
<body>
<span>
SPAN2
</span>
<div id="div1">
<h1>div h1</h1>
</div>
<div>
<h2 >div h2</h2>
</div>
<div>
<span>div span</span>
</div>
<div>
<span>
<span id="sp1">div.div.span1</span>
<span>div.div.span2</span>
</span>
</div>
<span>
SPAN1
</span>
</body>
</html>
第二、內容過濾選擇器
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>"><title>JQuery DEMO</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<style type="text/css">
div {
width: 250px;
height: 100px;
border: 1px solid black;
float: left;
padding: 10px;
}
span {
margin: 3px;
border: 1px solid black;
padding: 5px;
}
h1, h2 {
display: inline;
}
</style>
<!--引入 jquery.js 文件-->
<script type="text/javascript" src="js/jquery/jquery-1.3.2.js">
</script>
<script type="text/javascript">
$(function(){
//選取所有 內容有1的 div
$("div:contains('1')").css("border","1px solid red");
//選取不包含子元素(包括文本元素)的div空元素
$("div:empty").css("background","red");
//改變含有class爲mini元素的div元素的背景色
$("div:has(.mini)").css("background","#bbffaa");
//含有 子元素的div
$("div:parent").css("background","#eeeeee");
//選取所有不可見的img元素 顯示5000毫秒
$("img:hidden").show(5000);
//選取所有可見的p元素 :visible
$("p:visible").css("border","1px dashed blue");
});
</script>
</head>
<body>
<span>SPAN2</span>
<div id="div1">
<h1>div h1</h1>
<h2>div h2</h2>
<h1>div h3</h1>
</div>
<div>
<h2>div h2</h2>
<span>div span</span>
</div>
<div>
</div>
<div class="mini">
<span><span id="sp1">div.div.span1</span><span>div.div.span2</span></span>
</div>
<span>SPAN1</span>
<p><input type="text" class="normalText" value="1232"></p>
<p><input type="password" value="1232"></p>
<p><input type="text" value="1232"></p>
<p><input type="text" value="1232"></p>
<p>
<textarea>132</textarea>
<textarea>333</textarea>
<textarea>444</textarea>
<textarea>5555</textarea>
</p>
<!--此圖片緩慢顯示-->
<img style="display:none" src="image/gun01.jpg" width="400px" height="250px">
</img>
</body>
</html>
第三、屬性過濾選擇器
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>"><title>JQuery DEMO</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<style type="text/css">
div{
width:250px;
height:100px;
border:1px solid black;
float:left;
padding:10px;
}
span{
margin:3px;
border:1px solid black;
padding:5px;
}
h1,h2{
display:inline;
}
</style>
<!--引入 jquery.js 文件-->
<script type="text/javascript" src="js/jquery/jquery-1.3.2.js">
</script>
<script type="text/javascript">
$(function(){
//選取擁有屬性id的元素
$("div[id]").css("color","red");
//選取title的值爲 normal 的div元素
$("div[title=normal]").css("color","blue");
//選取title的值不爲normal2 的span元素
$("span[title!=normal2]").css("color","red");
//選取屬性的值以test開頭的元素
$("span[title^=test]").css("font-size","20");
//選取屬性的值以3結束的元素
$("span[title$=3]").css("font-size","20");
//選取屬性的值含有 normal 的元素
$("span[title*=normal]").css("font-size","20");
//選取滿足多個條件 選取擁有屬性id,並且屬性title以test結束的 div 元素
$("div[id][title$=test]").css("color","blue");
});
</script>
</head>
<body>
<span title="normal">
SPAN2
</span>
<div id="div1">
<h1>div h1</h1>
</div>
<div title="normal">
<h2 >div h2</h2>
</div>
<div>
<span>div span</span>
</div>
<div>
<span title="test123">
<span id="sp1" title="normal2">div.div.span1</span>
<span>div.div.span2</span>
</span>
</div>
<span title="normal2">
SPAN1
</span>
</body>
</html>
第四、表單對象屬性過濾選擇器
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>"><title>JQuery DEMO</title>
<style type="text/css">
</style>
<!--引入 jquery.js 文件-->
<script type="text/javascript" src="js/jquery/jquery-1.3.2.js">
</script>
<script type="text/javascript">
$(function(){
//改變表單內可用<input>元素的值
$("#form1 input:enabled").val("可用變化了！");
//改變表單內不可用<input>元素的值
$("#form1 input:disabled").val("不可用變化了！");
//獲取多選框中的個數
alert("多選框選中的個數爲:"+$("input:checked").length);
//獲取下拉框選中的內容
alert("下拉框選中的內容爲:"+$("select :selected").text());
//獲取表單內表單元素的個數 不一定指的是 <input>標籤
alert("表單內input的個數:"+$("#form1 :input").length);
//獲取表單內單行文本框的個數
alert("表單內text的個數:"+$("#form1 :text").length);
});
</script>
</head>
<body>
<form id="form1" action="#">
<p> 可用元素:<input name="add" value="可用文本框"/>
<p> 不可用元素:<input name="add" disabled ="true" value="不可用文本框"/>
<p> 可用元素:<input name="che" value="可用文本框"/>
<p>
不可用元素:<input name="chu" disabled ="true" value="不可用文本框"/>
<hr>
多選框
<p>
<input type="checkbox" name="email" checked="checked" value="1">choose one
</p>
<p>
<input type="checkbox" name="email" value="2">choose 2
</p>
<p>
<input type="checkbox" name="email" value="3">choose 3
</p>
<p>
<input type="checkbox" name="email" value="4">choose 4
</p>
<p>
<input type="checkbox" name="email" checked="checked" value="5">choose 5
</p>
<p>
<select name="test1" multiple="multiple" size="5">
<option>浙江</option>
<option selected="selected">湖南</option>
<option>天津</option>
<option selected="selected">北京</option>
<option>湖北</option>
</select>
</p>
<p>
<select name="test2" >
<option>浙江</option>
<option>湖南</option>
<option>天津</option>
<option selected="selected">北京</option>
<option>湖北</option>
</select>
</p>
</form>
</body>
</html>