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新建html文档。

书写hmtl代码。

<div class="wrap">

<div class="logo">

<h1><a href="#">鼠标移入侧边栏</a></h1>

</div>

</div>

<div class="nav-main">

<div class="nav-box">

<div class="nav">

  <ul class="nav-ul">

  <li><a href="#" class="home"><span>百度经验</span></a></li>

  <li><a href="#" class="develop"><span>百度经验</span></a></li>

  <li><a href="#" class="wechat"><span>百度经验</span></a></li>

  <li><a href="#" class="case"><span>百度经验</span></a></li>

  <li><a href="#" class="news"><span>百度经验</span></a></li>

  <li><a href="#" class="contact"><span>百度经验</span></a></li>

  </ul>

</div>

<div class="nav-slide">

    <div class="nav-slide-o"></div>

    <div class="nav-slide-o">

    <ul>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    </ul>

    </div>

    <div class="nav-slide-o">

    <ul>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    </ul>

    </div>

    <div class="nav-slide-o">

    <ul>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    </ul>

    </div>

    <div class="nav-slide-o">

    <ul>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    <li><a href="#"><span>百度经验</span></a></li>

    </ul>

    </div>

</div>

</div>

</div>

书写css代码。

html, body, div, dl, dt, dd, ul, ol, li, h1, h2, h3, h4, h5, h6, pre, form, fieldset, input, p, blockquote, th, td, textarea { margin: 0; padding: 0; font-size: 14px; line-height: 24px; color: #000; font-family: 'microsoft yahei', verdana, Tahoma; }

ol, ul, li { list-style: none; line-height: 22px; }

ol, ul { zoom: 1; }

h1, h2, h3, h4, h5, h6 { font-size: 100%; }

img { border: none; max-width: 100%; }

a, a:link, a:visited { cursor: pointer; text-decoration: none; }

a:hover { cursor: pointer; }

.table { border-collapse: collapse; border-spacing: 0; }

.table td { border: solid 1px #666; }

.clear { clear: both; float: none; overflow: hidden; height: 0; font-size: 0; }

.clearFix:after { clear: both; display: block; visibility: hidden; height: 0; line-height: 0; content: "."; }

.clearFix { zoom: 1; }

* { -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box; }

:after, :before { -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box; }

.font { font: 14px/24px "Comic Sans MS"; }

:focus { outline: none; }

.css3pie { -webkit-border-radius: 5px; -moz-border-radius: 5px; border-radius: 5px; behavior: url(css3pie/PIE.htc); }

body { font-size: 14px; font-family: "黑体-简", "黑体", "微软雅黑", Arial, Gotham, "Helvetica Neue", Helvetica, sans-serif; width: 100%; margin: 0 auto; background-color: #313131; overflow-x: hidden; }

.wrap { width: 100%; height: 1000px; }

.wrap p { font-size: 48px; text-align: center; color: #fff; padding-top: 280px; line-height: 60px; }

.logo { text-align: center; vertical-align: middle; background: #357dd7; margin-left: 45%; top: 20%; z-index: 11; width: 240px; height: 240px; overflow: hidden; position: relative; }

.logo:hover { box-shadow: 0px 0px 10px #333; }

.logo h1 { display: table-cell; vertical-align: middle; width: 240px; height: 240px; }

.logo a { width: 240px; height: 240px; overflow: hidden; }

.logo a:before { content: ''; position: absolute; left: -230%; top: 0px; width: 200%; height: 120%; background: #1f415f; z-index: 1; transform: skew(30deg, 0); -webkit-transform: skew(30deg, 0); -ms-transform: skew(30deg, 0); -moz-transform: skew(30deg, 0); -o-transform: skew(30deg, 0); transition: all .5s; -moz-transition: all .5s; -webkit-transition: all .5s; -o-transition: all .5s; }

.logo a:hover { background: #357dd7; }

.logo a:hover:before { left: -60px; }

.logo img { position: relative; z-index: 1; }

.nav-main { position: fixed; top: 0; z-index: 12; height: 100%; width: 100px; color: #fff; background: #111213; }

.nav-main a { color: #fff; }

.nav-box { position: relative; perspective: 200px; -webkit-perspective: 200px; transform-style: preserve-3d; -webkit-transform-style: preserve-3d; height: 100%; z-index: 99; }

.nav-ul li a { display: block; width: 100px; height: 100px; overflow: hidden; text-align: center; position: relative; transition: all .5s; -moz-transition: all .5s; -webkit-transition: all .5s; -o-transition: all .5s; }

.nav-ul li a:before { content: ''; position: absolute; left: -240px; top: 0px; width: 200px; height: 100%; background: #629feb; z-index: 1; transform: skew(30deg, 0); -webkit-transform: skew(30deg, 0); -ms-transform: skew(30deg, 0); -moz-transform: skew(30deg, 0); -o-transform: skew(30deg, 0); transition: all .5s; -moz-transition: all .5s; -webkit-transition: all .5s; -o-transition: all .5s; }

.nav-ul li a:hover { background: #357dd7; }

.nav-ul li a:hover:before { left: -30px; }

.nav-ul li a:after { content: ''; position: absolute; width: 100%; height: 30px; left: 0; top: 20px; z-index: 1; }

.nav-ul li a span { display: block; margin-top: 60px;  perspective:;

position: relative; z-index: 1; }

.nav-slide { position: fixed; left: 100px; top: 0; width: 240px; height: 100%; background: #252829; transform: rotateY(120deg); -webkit-transform: rotateY(120deg); -moz-transform: rotateY(120deg); -o-transform: rotateY(120deg); -ms-transform: rotateY(120deg); z-index: 99; visibility: hidden; transform-origin: 0 0; -webkit-transform-origin: 0 0; -moz-transform-origin: 0 0; -o-transform-origin: 0 0; -ms-transform-origin: 0 0; backface-visibility: hidden; -webkit-backface-visibility: hidden; transition: all .5s; -webkit-transition: all .5s; -moz-transition: all .5s; -o-transition: all .5s; transition-timing-function: cubic-bezier(.08, .72, .71, .96); -webkit-transition-timing-function: cubic-bezier(.08, .72, .71, .96); }

.nav-slide.hover { transform: rotateY(0deg); -webkit-transform: rotateY(0deg); -moz-transform: rotateY(0deg); -o-transform: rotateY(0deg); -ms-transform: rotateY(0deg); z-index: 15; visibility: visible; }

.nav-slide-o li a { line-height: 50px; display: block; padding: 0 20px; font-size: 14px; overflow: hidden; text-align: left; position: relative; transition: all .5s; -webkit-transition: all .5s; -moz-transition: all .5s; -o-transition: all .5s; }

.nav-slide-o li a:before { content: ''; position: absolute; left: -230%; top: 0px; width: 200%; height: 100%; background: #629feb; z-index: 1; transform: skew(30deg, 0); -webkit-transform: skew(30deg, 0); -moz-transform: skew(30deg, 0); -o-transform: skew(30deg, 0); -ms-transform: skew(30deg, 0); transition: all .5s; -webkit-transition: all .5s; -moz-transition: all .5s; -o-transition: all .5s; }

.nav-slide-o li a:hover { background: #357dd7; }

.nav-slide-o li a:hover:before { left: -60px; }

.nav-slide-o li a span { position: relative; z-index: 1; }

.nav-slide-o { display: none; }

书写并添加js代码。

<script src="js/jquery-1.9.1.min.js"></script>

<script>

$(function(){

var thisTime;

$('.nav-ul li').mouseleave(function(even){

thisTime = setTimeout(thisMouseOut,1000);

})

$('.nav-ul li').mouseenter(function(){

clearTimeout(thisTime);

var thisUB = $('.nav-ul li').index($(this));

if($.trim($('.nav-slide-o').eq(thisUB).html()) != "")

{

$('.nav-slide').addClass('hover');

$('.nav-slide-o').hide();

$('.nav-slide-o').eq(thisUB).show();

}

else{

$('.nav-slide').removeClass('hover');

}

})

function thisMouseOut(){

$('.nav-slide').removeClass('hover');

}

$('.nav-slide').mouseenter(function(){

clearTimeout(thisTime);

$('.nav-slide').addClass('hover');

})

$('.nav-slide').mouseleave(function(){

$('.nav-slide').removeClass('hover');

})

})

</script>

代码整体结构。

查看效果。