<div class="tab">
<div class="tab_menu">
<ul>
<li class="selected">个人信息</li>
<li class="selected">我的照片</li>
<li class="selected">我的博客</li>
<div class="clear"></div>
</ul>
</div>
<div class="tab_box">
<div class="box">我的QQ:1511109272</div>
<div class="box hide">hi </div>
<div class="box hide"> hello <br> </div>
</div>
</div>

$(function() {
//网页选项卡的切换
var $menu_li = $("div.tab_menu ul li");
$menu_li.click(function(){
$(this).addClass("selected") //当前<li>高亮
.siblings().removeClass("selected"); //去掉其它同辈<li>的高亮
var index = $menu_li.index( $(this) ); //找到<li>子节点的索引
$("div.tab_box > div") //索引为N的DIV显示出来
.eq(index).show()
.siblings().hide();
})
})

.clear{ clear:both; height:0px; overflow:hidden;}
.tab{ width:400px; font-size:12px;}
.tab_menu ul{ padding:0px;margin:0px;}
.tab_menu li{ list-style:none; display:block; float:left;
background:#C2CEFE; height:22px; line-height:22px;
padding: 0px 8px; margin-right:6px; border:#86B4CA 1px solid;
}
.box{ width:400px; height:200px; overflow:hidden; border:#A8C9D9 1px solid; padding:10px 8px; }
.tab_menu ul li.selected{background:#dadada; cursor:pointer; }
.hide{ display:none;}