下面小編就為大家?guī)硪黄猨s操作DOM--添加、刪除節(jié)點(diǎn)的簡(jiǎn)單實(shí)例。小編覺得挺不錯(cuò)的,現(xiàn)在就分享給大家,也給大家做個(gè)參考。
js removeChild() 用法
<body>
<p id="p1">welcome to <b>javascript</b> world !</p>
<script language="javascript" type="text/javascript">
<!--
function nodestatus(node)
{
var temp="";
if(node.nodeName!=null)
{
temp+="nodeName="+node.nodeName+"\n";
}
else temp+="nodeName=null \n";
if(node.nodeType!=null)
{
temp+="nodeType="+node.nodeType+"\n";
}
else temp+="nodeType=null \n";
if(node.nodeValue!=null)
{
temp+="nodeValue="+node.nodeValue+"\n";
}
else temp+="nodeValue=null \n";
return temp;
}
var parent=document.getElementById("p1");
var msg="父節(jié)點(diǎn) \n"+nodestatus(parent)+"\n";
//返回元素節(jié)點(diǎn)p的最后一個(gè)孩子
last=parent.lastChild;
msg+="刪除之前:lastChild--"+nodestatus(last)+"\n";
//刪除節(jié)點(diǎn)p的最后一個(gè)孩子,變?yōu)閎
parent.removeChild(last);
last=parent.lastChild;
msg+="刪除之后:lastChild--"+nodestatus(last)+"\n";
alert(msg);
-->
</script>
</body>
--------------------------------------------------------------
<html>
<head>
<title>js控制添加、刪除節(jié)點(diǎn)</title>
</head>
<script type="text/javascript">
var all;
function addParagraph() {
all = document.getElementById("paragraphs").childNodes;
var newElement = document.createElement("p");
var seq = all.length + 1;
//創(chuàng)建新屬性
var newAttr = document.createAttribute("id");
newAttr.nodeValue = "p" + seq;
newElement.setAttribute(newAttr);
//創(chuàng)建文本內(nèi)容
var txtNode = document.createTextNode("段落" + seq);
//添加節(jié)點(diǎn)
newElement.appendChild(txtNode);
document.getElementById("paragraphs").appendChild(newElement);
}
function delParagraph() {
all = document.getElementById("paragraphs").childNodes;
document.getElementById("paragraphs").removeChild(all[all.length -1]);
}
</script>
<style>
p{
background-color : #e6e6e6 ;
}
</style>
<body>
<center>
<input type="button" value="添加節(jié)點(diǎn)" onclick="addParagraph();"/>
<input type="button" value="刪除節(jié)點(diǎn)" onclick="delParagraph();"/>
<div id="paragraphs">
<p id="p1">段落1</p>
<p id="p2">段落2</p>
</div>
</center>
</body>
</html>
以上這篇js操作DOM--添加、刪除節(jié)點(diǎn)的簡(jiǎn)單實(shí)例就是小編分享給大家的全部?jī)?nèi)容了,希望能給大家一個(gè)參考