左边条纹跟随鼠标滑动导航

demo下载地址：http://pan.baidu.com/s/1ntqyxjr

效果如下：

代码如下：

立即学习“前端免费学习笔记（深入）”；

/*---------重置---------*/html {    font-size: 100%;    -webkit-text-size-adjust:100%;    -ms-text-size-adjust:100%;*overflow:auto;    _overflow-x:hidden;}body {    margin:0;}p, ul, ol, form, dl, h1, h2, h3, h4, h5, h6 {    margin-top:0;    margin-bottom:0;}dl, dd {    margin-left:0;}ul, ol {    padding-left:0;*margin-left:0;    list-style-type: none;}ul li {*zoom:1;*vertical-align:bottom;}em, var, cite, i {    font-style:normal;}small {    font-size:inherit;}s, a {    text-decoration:none;}:focus {    outline:none;}blockquote, q {    quotes:none;    margin:0;}table {    border-collapse:collapse;    border-spacing:0;    empty-cells:show;/*table-layout:fixed;*/}img, iframe {    border:none;}img {    vertical-align: top;    -ms-interpolation-mode: bicubic;/*ie7防止图片缩小失真的*/}/*---------竖向菜单（非必需）---------*/.bl-vernav li {    border-bottom:1px solid #ddd;    margin-bottom:-1px;    padding-top:1px;}.bl-vernav a {    display:block;    height:20px;    line-height:20px;    padding:10px 16px;}.bl-vernav a:hover {    background:#F8F8F8;    text-decoration:none;}/*.bl-vernav .cur a{ background:#428BCA; color:#fff;}*/.bl-vernav-ord {    border:1px solid #ddd;}.vernav-level li li {    border-left:none;    border-right:none;}.vernav-level li li a {    padding-left:40px;}.vernav-level .cur .one {    background:#F8F8F8;}.vernav-level li .cur a {    background:#F8F8F8;}/*diy*/    .bl-vernav-wrap {    position:relative;}.bl-vernav-wrap .sideLine {    position:absolute;    left:-6px;    top:0;    z-index:1;    line-height:0;    font-size:0;    border-left:#FF5F3E solid 7px;    background-color:#F8F8F8;}.bl-vernav {    position:relative;    z-index:2;}.bl-vernav a:hover {    background-color:transparent;}.demobox {    width:460px;    font-size:14px;    color:#333;    font-family:'Hiragino Sans GB', 'Microsoft Yahei', "WenQuanYi Micro Hei", SimSun, Tahoma, Arial, Helvetica, STHeiti;}a {    color:#333;    text-decoration:none;}
    
左边条纹跟随鼠标滑动导航
    
        
        
导航菜单
            
 神探夏洛克                
海贼王
                    
海贼王
                    
海贼王
                
            
神探夏洛克
            
神探夏洛克
            
神探夏洛克
        
$(function(){    var verNav = $(".bl-vernav"),        //第一层ul.        line = verNav.siblings(".sideLine"),    //左边条纹线        verNavFirst = verNav.children("li:first"),        //第一层ul中第一个li        curY = verNav.children("li.cur").position().top;            line.height(verNavFirst.outerHeight()-1).width(verNavFirst.outerWidth());//设置辅助线初始化高度和宽度，也可以直接用css设置好，这里就不用js计算了     verNav.find("li").mouseenter(function(){        var thisY = $(this).position().top;        line.stop(true,true).animate({top:thisY},200);        return false    })    .end()    .mouseleave(function(){        line.stop(true,true).animate({top:curY},300)        }).trigger("mouseleave");});

登录后复制