JavaScript高级程序设计学习笔记5: DOM基础
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-
transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>DOM</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<mce:script type="text/javascript"><!--
function test() {
//访问<html/>元素
var oHtml = document.documentElement;
//访问<head/>元素
var oHead = oHtml.firstChild;
/* 也可以用下面方法
var oHead = oHtml.childNodes[0];
var oHead = oHtml.childNodes.item(0);
*/
//访问<body/>元素
var oBody = oHtml.lastChild;
/* 也可以用下面方法
var oBody = oHtml.childNodes[1];
var oBody = oHtml.childNodes.item(1);
var oBody = document.body;
*/
//oHtml,oHead,oBody三者之类的关系
alert(oBody.parentNode == oHtml); //true
alert(oBody.previousSibling == oHead); //true
alert(oHead.nextSibling == oBody); //true
alert(oBody.ownerDocument == document); //true
//getElementsByTagName()返回一个包含所有的tagName特性等于某个指定值的元素的NodeList
var oDiv = document.getElementsByTagName("div");
alert(oDiv[0].tagName); //DIV
var oInput = oDiv[0].getElementsByTagName("input");
alert(oInput[0].tagName); //INPUT
//getElementsByName()获取所有name特性等于指定值的元素
var oRadios = document.getElementsByName("radColor");
for(var i=0;i<oRadios.length;i++) {
if(oRadios[i].checked == true)
alert(oRadios[i].value); //或者用alert(oRadios[i].getAttribute("value"));
}
//getElementById()返回id特性等于指定值的元素
var oDiv2 = document.getElementById("div2");
/*
创建节点,
结果:
<div id="div2"><p id="p1">段落文字</p></div>
*/
var oP = document.createElement("p");
oP.setAttribute("id", "p1");
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......
JavaScript代码
<mce:script type="text/javascript"><!--
function imageOver(e) {
e.style.border="1px solid red";
}
function imageOut(e) {
e.style.borderWidth=0;
}
// --></mce:script>
<img src="phplamp.gif" onmouseover="imageOver(this)" onmo ......
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原文地址:http://www.playes.net/Blog/535.asp
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当然脚本失效也有轻重,有时是页面全部烂晒,图片文字全部显示错位,惨不忍睹,其实坏的这么彻底反 ......
< HTML >
< HEAD >
< TITLE > 合同申请 </ TITLE >
< meta http-equiv ="Content-Type" content ="text/html; charset=gb2312" >
< SCRIPT LANGUAGE = JavaScript >
/* * Define object Dsy 构造器
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