节点的增删改查
[mw_shl_code=html,true]<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.div1,.div2,.div3,.div4{
width: 300px;
height: 100px;
}
.div1{
background-color: green;
}
.div2{
background-color: yellow;
}
.div3{
background-color: rebeccapurple;
}
.div4{
background-color: deeppink;
}
</style>
</head>
<body>
<div class="div1">
<button onclick="add()">add</button>
hello div1
</div>
<div class="div2">
<button onclick="del()">del</button>
hello div2
</div>
<div class="div3">
<button onclick="change()">change</button>
<p>hello div3</p>
</div>
<div class="div4">hello div4</div>
<script>
###############增加节点######################
function change() {
var img=document.createElement("img");//<img src="">
//img.setAttribute("src","meinv.jpg");
img.src="meinv.jpg";
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