页面mask css

<html>

    <head>

        <style type="text/css">

          .share_mask {

            position: fixed;

            top: 0;

            left: 0;

            z-index: 9998;

            width: 100%;

            height: 100%;

            background: rgba(0,0,0,.6);

        }

        .ip_none {

    position: absolute;

    top: 40%;

    left: 50%;

    margin-top: -150px;

    margin-left: -150px;

    width: 300px;

    height: 300px;

}

        </style>

    </head>

    <body>

        <div class="share_mask" style="display:none" > 

  <img class="ip_none" src="http://cx.hedayikao.com/Content/imgs/qrcode_for_gh_30e7ad15afa9_860.jpg" data-src="http://cx.hedayikao.com/Content/imgs/qrcode_for_gh_30e7ad15afa9_860.jpg">

 </div>

    </body>

</html>
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