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，也希望大家多多支持腳本之家。

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