本文实例讲述了javascript通过获取html标签属性class实现多选项卡的方法。分享给大家供大家参考。具体实现方法如下：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>原生javascript通过获取html标签属性class实现多选项卡</title>
<style type="text/css">
.tab {
clear: both;
margin: 20px auto;
padding: 10px;
width: 680px;
overflow: hidden;
}
.tab .tab-menu {
margin: 0;
padding: 0;
list-style: none;
}
.tab .tab-menu li {
display: inline;
margin: 0 2px 0 0;
}
.tab .tab-menu li a {
padding: 0 1em;
text-decoration: none;
color: #a80;
background: #fe5;
}
.tab .tab-menu li a:hover {
background: #fc0;
color: #540;
}
.tab .tab-menu .active {
}
.tab .tab-menu .active a {
padding-bottom: 2px;
font-weight: bold;
color: black;
background: #fc0;
}
.tab .tab-panel {
padding: 1em;
border: 2px solid #fc0;
background: #fff;
}
.tab .tab-panel h2 {
font-size: 1.5em;
color: #fc0;
}
.tab .tab-none {
display: none;
}
</style>
<script type="text/javascript">
function Tab(style, scope){
this.oItem = this.getByClass(style, scope);
this.init();
}
Tab.prototype = {
init: function(){
var that = this, menu, m;
for(var i = 0, len = this.oItem.length; i < len; i++){
menu = this.oItem[i].getElementsByTagName('li');
for(var j = 0, mLen = menu.length; j < mLen; j++){
m = menu[j];
m.index = j;
m.onmouseover = function(){that.focus(this);}
}
}
},
focus: function(o){
var par = o.parentNode.parentNode, panel = par.getElementsByTagName('div'),
btn = par.getElementsByTagName('li'), len = btn.length;
for(var i = 0; i < len; i++){
btn[i].className = '';
panel[i].className = this.changeClass(panel[i].className, 'tab-none', true);
}
o.className = 'active';
panel[o.index].className = this.changeClass(panel[o.index].className, 'tab-none', false);
},
changeClass: function(cl, cl2, add){
var flag;
if(cl.match(cl2) != null) flag = true;
if(add ^ flag) return flag ? cl.replace(cl2, '') : cl += ' ' + cl2;
return cl;
},
getByClass: function(cla, obj){
var obj = obj || document, arr = [];
if(document.getElementsByClassName){
return document.getElementsByClassName(cla);
} else {
var all = obj.getElementsByTagName('*');
for(var i = 0, len = all.length; i < len; i++){
if(all[i].className.match(cla) != null) arr.push(all[i]);
}
return arr;
}
}
}
window.onload = function(){
new Tab('tab-menu', null);
}
</script>
</head>
<body>
<div class="tab">
<ul class="tab-menu">
<li class="active"><a href="">111</a></li>
<li><a href="">122</a></li>
<li><a href="">133</a></li>
</ul>
<div class="tab-panel">
111
</div>
<div class="tab-panel tab-none">
122
</div>
<div class="tab-panel tab-none">
133
</div>
</div>
<div class="tab">
<ul class="tab-menu">
<li class="active"><a href="">211</a></li>
<li><a href="">222</a></li>
<li><a href="">233</a></li>
</ul>
<div class="tab-panel">
211
</div>
<div class="tab-panel tab-none">
222
</div>
<div class="tab-panel tab-none">
233
</div>
</div>
<div class="tab">
<ul class="tab-menu">
<li class="active"><a href="">311</a></li>
<li><a href="">322</a></li>
<li><a href="">333</a></li>
</ul>
<div class="tab-panel">
311
</div>
<div class="tab-panel tab-none">
322
</div>
<div class="tab-panel tab-none">
333
</div>
</div>
</body>
</html>
希望本文所述对大家的javascript程序设计有所帮助。
