利用table-cell实现图片垂直居中

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>图片垂直居中(兼容各主流浏览器，含IE6/IE7)</title>
        <style media="screen">
            /* 样式 */
            .box-1{ display:table;}
            .img-wrap-1{ display:table-cell; width:200px; height:200px; border:1px solid #ccc; text-align:center; *font-size:178px; zoom:1; vertical-align:middle;}
            /* height与font-size之比大约为：1:0.893; zoom:1是为了触发IE的hasLayout */
        </style>
    </head>
    <body>
        <p>利用table-cell实现居中，font-size做兼容兼容IE6+/FF/Chrome</p>
        <div class="box-1">
            <a class="img-wrap-1" href="#">
                <img src="images/1.png" alt="" />
            </a>
        </div>
    </body>
</html>