实现鼠标移过时，显示图片的功能

HTML

<a class="gongzhong" style="cursor:pointer;">公众号 <img src="../style/images/1-15050G03943C6.jpg" /></a>

CSS

    a.gongzhong {
    position: relative;
    }
        a.gongzhong img{
            display: none;
            position:absolute;
            left: 50%;
            margin-left: -60px;
            margin-top: -2px;
        }
        a.gongzhong:hover img{
            display: block;
        }