<%@ 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,
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原文地址:http://4837471.blog.51cto.com/4827471/1569157