JavaScript 封装一个tab效果源码分享

效果图如下：

html代码

<!DOCTYPE html>

<html>

<head>

<title>tab测试</title>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-" />

<link href="css/tab.css" rel="stylesheet" type="text/css" />

<script type="text/javascript" src="js/tab-min.js"></script>

</head>

<body>

<div id="tab">

<!-- tabHead -->

<ul class="tab-nav">

<li><a href="javascript:void()">交易安全</a></li>

<li><a href="javascript:void()">淘宝大学</a></li>

<li><a href="javascript:void()">爱心</a></li>

</ul>

<!-- tabPanel-->

<ul class="tab-bd">

<li></li>

<li></li>

<li></li>

</ul>

</div>

<script type="text/javascript">

tabPanel({"panel":"tab"});//panel为必填项，default、defalutStyle、hoverStyle为选填项

</script>

</body>

</html>

js代码

function tabPanel(param){

var defaultIndex=param["default"]||,//设置显示的页面

panelobj=param["panel"],//设置tab容器

defalutClass=param["defalutStyle"]||"",//设置tab菜单项的普通样式

hoverClass=param["hoverStyle"]||"hover",//设置鼠标移到tab菜单项的样式

currentIndex=defaultIndex,

menus=_$(panelobj).getElementsByTagName("ul")[].getElementsByTagName("li"),

contents=_$(panelobj).getElementsByTagName("ul")[].getElementsByTagName("li"),

menuNumber=menus.length,

hidden="hidden";

for(var i=;i<menuNumber;i++){

_setClass(contents[],hoverClass);

_setClass(contents[i],hidden);

_setClass(menus[i],defalutClass);

(function(i){

menus[i].onmouseover=function(){

var old=menus[currentIndex];

_setClass(old,defalutClass);

_setClass(contents[currentIndex],hidden);

var cur=menus[i];

_setClass(cur,hoverClass);

currentIndex=i;

_setClass(contents[i],"");

};

})(i);

}

_setClass(menus[currentIndex],hoverClass);

_setClass(contents[currentIndex],"");

//便利函数

function _setClass(obj,className){obj.className=className}

function _$(oid){return typeof(oid) == "string"?document.getElementById(oid):oid}

}

css代码

#tab{border:px solid #ccc;}

#tab .tab-bd{border-top:none;margin: auto;padding:px;text-align:left;height:px;position:relative}

.tab-nav{margin: auto;padding:;background:#eee;height:px;}

.tab-nav li{display:inline;list-style:none outside none;width:px;height:px;float:left;line-height:px;text-align:center;}

.tab-nav li a{color:#;display:inline-block}

.tab-nav li a:hover,.tab-nav li.hover a{text-decoration:none;background:#fff;color:#;display:block; }

.hidden{display:none}