<!-- 科目导航 -->
        <div id="navBox" class="navMain">
            <ul class="nav" style="position:relative!important;">
                <li><a class="active" href="javascript:;">全部</a></li>
                <li><a href="javascript:;">数学</a></li>
                <li><a href="javascript:;">英语</a></li>
                <li><a href="javascript:;">语文</a></li>
                <li><a href="javascript:;">物理</a></li>
                <li><a href="javascript:;">思想品德</a></li>
            </ul>
        </div>

/* 滑动导航 */
.nav li {
    float: left;
    min-width: 60px;
    padding: 5px 0;
    margin-right: 9px;
}
.nav a{
  font-size: 14px;
  color: #999;
}
.navMain{
    background-color: #fff;
    position: relative;
    margin: 0 13px;
}
.nav{
    background-color: #fff;
    overflow: hidden;
}
.nav li>a.active{
    color: #3a95f5;
    border-bottom: 1px solid #3a95f5;
    padding-bottom: 2px;
}

$(".nav li a").click(function(){
    $(this).addClass("active").parents("li").siblings().find("a").removeClass("active");
  });
  window.addEventListener('load',function(){
    var $navBox = document.getElementById('navBox'),
        $ul = $navBox.querySelector('ul'),
        liArray = $navBox.querySelectorAll('li'),
        liLength = $navBox.querySelectorAll('li').length;10     $ul.style.width = (liArray[0].clientWidth + 10)*liLength +"px";
    var carousel=new iScroll("carousel",{hScrollbar:false, vScrollbar:false, vScroll: false});
  });