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}
