<%@ page language="java" import="java.util.*" pageEncoding="GB2312"%>
<%
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>JavaScript</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">
-->
<script type="text/javascript">
window.onload = function(){
//获得City节点的所有子节点
var cityNode = document.getElementById("City");
//cityNode.childNodes.length获取子节点的长度，不太实用
alert(cityNode.childNodes.length);
//获取City所有li子节点
var cityLiNode = cityNode.getElementsByTagName("li");
//li子节点数量
alert(cityLiNode.length);
//获得第一个节点对象
alert(cityNode.firstChild);
//获得最后一个节点对象
alert(cityNode.lastChild);
}
</script>
</head>
<body>
<p>你喜欢哪个城市</p>
<ul id="City">
<li id="bj" name="beijing">北京</li>
<li id="Sh">上海</li>
<li>广州</li>
<li>深圳</li>
</ul>
<br/>
<p>你喜欢哪款单机游戏</p>
<ul id="game">
<li>反恐精英</li>
<li>魔兽</li>
<li>红警</li>
<li>实况</li>
</ul>
<br/>
<br/>
Name：<input id="name" type="text" name="username" value="LoveCoffee"/>
</body>
</html>
说明
<ul id="City"> <li id="bj" name="beijing">北京</li> <li id="Sh">上海</li> <li>广州</li> <li>深圳</li> </ul>
为什么有九个节点呢？
解释:
如图所示：
这篇文章要说明的是如何操作图片上绿色的Text节点
看如下代码:
<%@ page language="java" import="java.util.*" pageEncoding="GB2312"%>
<%
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>JavaScript</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">
-->
<script type="text/javascript">
window.onload = function(){
var cityNode = document.getElementById("City");
//九个
alert(cityNode.childNodes.length);
//获取City所有li子节点
var cityLiNode = cityNode.getElementsByTagName("li");
//4个
alert(cityLiNode.length);
alert(cityNode.firstChild);
alert(cityNode.lastChild);
//获取bj节点的所有子节点
var bjNode = document.getElementById("bj");
//获得bj节点子节点的第一个节点（可知为Text节点)
var bjText = bjNode.firstChild;
//读取文本节点的值
alert(bjText.nodeValue);
//修改文本节点大的值
bjText.nodeValue = "南昌";
}
</script>
</head>
<body>
<p>你喜欢哪个城市</p>
<ul id="City">
<li id="bj" name="beijing">北京</li>
<li id="Sh">上海</li>
<li>广州</li>
<li>深圳</li>
</ul>
<br/>
<p>你喜欢哪款单机游戏</p>
<ul id="game">
<li>反恐精英</li>
<li>魔兽</li>
<li>红警</li>
<li>实况</li>
</ul>
<br/>
<br/>
Name：<input id="name" type="text" name="username" value="LoveCoffee"/>
</body>
</html>
说明:
XX.nodeValue是获取和修改Text节点对象的值参数，
时间： 2024-10-10 09:11:14