不多说了，先给大家展示效果图，本文支持源码下载哦，需要的朋友可以直接下载使用，代码很简单哦～

在线预览 源码下载

html代码：

<a href="#">换肤</a><div class="heitiao"></div><div class="con"><img src="images/content.png" /></div><div class="head"> <div class="menu"> <div class="title"> <p class="p1"></p> <p class="p2"></p> </div> <div class="bg"> <div class="bgcon"> <img class="big" src="images/bg0s.jpg"> <img src="images/bg1s.jpg"> <img src="images/bg2s.jpg"> <img src="images/bg3s.jpg"> <img src="images/bg4s.jpg"> <img src="images/bg5s.jpg"> <img class="big" src="images/bg6s.jpg"> <img src="images/bg7s.jpg"> <img src="images/bg8s.jpg"> <img class="last" src="images/bg9s.jpg"> <img class="last" src="images/bg10s.jpg"> <img class="last" src="images/bg11s.jpg"> </div> <div class="bgyl"> <img src="images/yl.png"> </div> </div> </div> </div> <script type="text/javascript" src="js/jquery.js"></script> <script type="text/javascript"> var i=1; $("a").click(function(){ $(".head").animate({height:"288px"},500); }); $(".p2").click(function(){ $(".head").animate({height:"0px"},500); }); $(".bgcon img").hover(function(){ i=$(this).index(); $(".bgyl").css("background",'url(images/bg'+i+'.jpg)'); $(".bgyl").css("background-size","264px 180px"); }); $(".bgcon img").click(function(){ $("body").css("background",'url(images/bg'+i+'.jpg)'); }); </script>

css代码：

*{margin:0;padding:0} a{color:#fff; margin-top:10px; display:block; margin-left:18%; font-size:13px; position:absolute; } body{background:url(images/bg0.jpg);} .con{width:911px; height:317px; margin:50px auto;} .head{width:100%; height:0px; background:#fff; position:fixed; left:0px; top:0px; border-bottom:1px solid #e3e3e3; overflow:hidden; } .title{width:911px; height:45px; margin:0px auto;} .heitiao{width:100%; height:35px; background:rgba(0,0,0,0.7); } .menu{width:100%; height:45px; border-bottom:1px solid #e3e3e3;} .p1{width:861px; height:45px; background:url(images/p1.png); float:left; cursor:pointer;} .p2{width:50px; height:45px; background:url(images/sp.png); float:right; cursor:pointer; } .bg{width:911px; height:205px; margin:25px auto;} .bgcon{width:590px; height:190px; float:left; } .bgcon img{width:97px; height:59px; display:block; float:left; margin-right:1px; margin-bottom:1px; } .bgcon .big{width:195px; height:119px;} .bgcon .last{position:relative; top:-60px; } .bgyl{width:264px; height:180px; float:right; background:url(images/bg1s.jpg); background-size:294px;}

以上代码就是本文介绍基于jQuery实现仿百度首页换肤背景图片切换代码，希望大家喜欢。