Example of JavaScript implementing QQ list expansion, contraction and expansion functions-JS Tutorial-php.cn

Example of JavaScript implementing QQ list expansion, contraction and expansion functions

黄舟

Release： 2017-10-31 09:49:43

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The example of this article shares with you the specific code of js implementation of QQ list expansion, contraction and expansion display for your reference. The specific content is as follows

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Code:

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
ul,h2{margin:0; padding:0;}
li{list-style-type:none;}
#list{margin:0 auto; border:#333 solid 1px; width:250px;}
#list h2 {background: url(../img/ico1.gif) no-repeat 5px 14px #0C6; text-indent:20px; height:32px; line-height:32px;}
#list ul li{text-indent:25px; border-bottom:#333 solid 1px; line-height:24px; height:23px; }
#list .active{background: url(../img/ico2.gif) no-repeat 5px 14px #693; text-indent:20px; height:30px; line-height:30px;}
#list ul{display:none;}
.hover{background:#CFC;}
</style>
<script>
window.onload = function(){
var oUl = document.getElementById("list");
var aUl =oUl.getElementsByTagName("ul");
var aH2 = oUl.getElementsByTagName("h2");
var aLi = null;
var arrLi = [];
var that = null;
for(i=0;i<aH2.length;i++){
 aH2[i].index = i;
 aH2[i].onclick = function(){
 if(this.className==&#39;&#39;){
 for(i=0;i<aH2.length;i++){
aH2[i].className=&#39;&#39;;
aUl[i].style.display=&#39;none&#39;;
 }
this.className=&#39;active&#39;;
aUl[this.index].style.display = &#39;block&#39;;
}else{
this.className=&#39;&#39;;
aUl[this.index].style.display=&#39;none&#39;;
 }
             }
 }
for(i=0;i<aUl.length;i++){
  aLi =aUl[i].getElementsByTagName("li");
 for(j=0;j<aLi.length;j++){
  arrLi.push(aLi[j]);
 }
}
for(var i=0;i<arrLi.length;i++){
 arrLi[i].onclick = function(){
  for(i=0; i<arrLi.length;i++){ 
arrLi[i].className=&#39;&#39;;
 }
this.className = &#39;hover&#39;;
}
}

};
</script>
</head>


<body>
<ul id="list">
<li class="lis">
  <h2>我的好友</h2>
  <ul>
  <li>张三</li>
   <li>张四</li>
   <li>张五</li>
   <li>张六</li>
  </ul>
 </li>
 <li class="lis">
 <h2>企业好友</h2>
  <ul>
  <li>李四</li>
   <li>李小四</li>
   <li>李四二</li>
   <li>李毅</li>
   <li>李二</li>
  </ul>
 </li>
 <li class="lis">
 <h2>黑名单</h2>
  <ul>
  <li>张三</li>
  <li>李四</li>
  </ul>
 </li>
</ul>
</body>
</html>

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