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@@ -0,0 +1,78 @@
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+<!DOCTYPE html>
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+<html lang="en">
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+<head>
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+ <meta charset="UTF-8">
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+ <title>Document</title>
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+ <style>
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+ /* .box1,.box2{
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+ width: 100px;
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+ height: 100px;
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+ background-color: red;
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+ }
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+ .box2{
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+ background-color:blue;
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+ } */
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+ </style>
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+</head>
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+<body>
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+ <!-- <div class="box">
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+ <div class="box1"></div>
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+ <div class="box2"></div>
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+ </div> -->
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+ <div class="box">
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+ <div class="box1">
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+ 项目一
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+ <button class="up-btn">向上</button>
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+ <button class="down-btn">向下</button>
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+ </div>
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+ <div class="box2">
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+ 项目二
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+ <button class="up-btn">向上</button>
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+ <button class="down-btn">向下</button>
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+ </div>
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+ <div class="box3">
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+ 项目三
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+ <button class="up-btn">向上</button>
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+ <button class="down-btn">向下</button>
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+ </div>
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+ </div>
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+ <script>
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+ // var oBox = document.getElementsByClassName("box")[0];
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+ // var oBox1 = document.getElementsByClassName("box1")[0];
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+ // var oBox2 = document.getElementsByClassName("box2")[0];
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+ // oBox.insertBefore(oBox2,oBox1);
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+ var aUpBtn = document.getElementsByClassName("up-btn");
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+ var aDownBtn = document.getElementsByClassName("down-btn");
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+ var oBox = document.getElementsByClassName("box")[0];
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+ for(var i=0;i<aUpBtn.length;i++){
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+ // 绑定向上按钮
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+ aUpBtn[i].onclick = function(){
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+ // 获取当前点击按钮的父元素
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+ var oParent = this.parentNode;
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+ // 获取当前点击按钮的父元素的上一个兄弟元素
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+ var oPre = oParent.previousElementSibling;
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+ if(oPre){
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+ // 如果当前点击按钮的父元素的上一个兄弟元素存在 则向前位移
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+ oBox.insertBefore(oParent,oPre);
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+ }else{
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+ console.log("已经是第一个了");
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+ }
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+ }
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+ // 绑定向下按钮
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+ aDownBtn[i].onclick = function(){
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+ //获取当前点击按钮的父元素
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+ var oParent = this.parentNode;
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+ // 获取当前父元素的后边的兄弟
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+ var oNext = oParent.nextElementSibling;
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+ if(oNext){
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+ // 如果当前点击按钮的父元素的后边的兄弟存在 则向后位移
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+ oBox.insertBefore(oNext,oParent);
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+ }else{
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+ console.log("已经是最后一个了")
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+ }
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+ }
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+ }
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+ </script>
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+</body>
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+</html>
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