手机站横向滚动

写手机站时我们会遇到像这样的左右滑动的效果，刚开始还误以为是某个js效果，后来才知道，原来是css就可以实现的。

* {margin: 0;padding: 0;}
.box {width: 100%; height: 44px; background: rgba(252, 252, 252, .8); border-bottom: 1px solid #ebebeb; line-height: 40px; overflow: hidden; position: relative;}
.box2 {width: 100%; overflow: hidden; height: 52px; overflow-x: auto; position: relative;}
.box3 {width: 1400px; left: 0; position: absolute; top: 0;}
.box3 div {width: 86px; height: 44px; background: #999; float: left; padding: 0 10px;}

<div class="box">
    <div class="box2">
        <div class="box3">
            <div>first</div>
            <div>second</div>
            <div>third</div>
            <div>four</div>
            <div>five</div>
            <div>six</div>
            <div>first</div>
            <div>second</div>
            <div>third</div>
            <div>four</div>
            <div>five</div>
            <div>six</div>
        </div>
    </div>
</div>

<script type="text/javascript">
    $(function(){
        var $box3=$(".box3");
        var $boxM=$(".box3 div").length;
        var $box3W=(86+20)*$boxM;
        $box3.css("width",$box3W);
    })
</script>