function masLogin(conf) {
    var d = document.createElement("iframe"),
        e = conf.api_url + "?appid=" + conf.appid  + "&return_url=" + encodeURIComponent(conf.return_url) + "&rand_token=" + conf.rand_token + "&embed_flag=1";
    d.src = e, d.frameBorder = "0", d.allowTransparency = "true", d.scrolling = "no", d.width = conf.width, d.height = conf.height;
    d.sandbox = "allow-scripts allow-top-navigation allow-same-origin";
    var f = document.getElementById(conf.id);
    f.innerHTML = "";
    f.appendChild(d);
}

function GetParams() {
    var url = location.search; //获取url中"?"符后的字串
    var params = new Object();
    if (url.indexOf("?") != -1) {
        var str = url.substr(1);
        strs = str.split("&");
        for(var i = 0; i < strs.length; i ++) {
            params[strs[i].split("=")[0]] = unescape(strs[i].split("=")[1]);
        }
    }
    return params;
}

function encodeSearchParams(obj) {
  var params = [];

  Object.keys(obj).forEach((key) => {
    let value = obj[key];
    if (typeof value === 'undefined') {
      value = '';
    }
    params.push([key, encodeURIComponent(value)].join('='))
  });

  return params.join('&');
}

function microLogin(id) {

    //防止chrome回退后的Bug
    var elem = document.getElementById(id);
    var ifr = document.createElement("iframe");    
    elem.appendChild(ifr);

    while(elem.hasChildNodes()) //当elem下还存在子节点时 循环继续
    {
        elem.removeChild(elem.firstChild);
    }

    var paramsStr = "";
    var params = GetParams();
    var serviceParam = params['service'];
    if (serviceParam) {
        //if ((serviceParam.indexOf("http://ca.cupl.edu.cn") >= 0) || (serviceParam.indexOf("https://ca.cupl.edu.cn") >= 0)) {
        //    params['service'] = "";
        //} else {
            paramsStr = encodeSearchParams(params);
        //}
    }

    //var paramsStr = encodeSearchParams(GetParams());
    var retUrl = document.location.protocol + "//ca.cupl.edu.cn/tpass/login_auth";

    if (paramsStr.length > 0) {
        retUrl = retUrl + "?" + paramsStr;
    }


    var objLogin = {
        id: id,
        api_url: "https://mas.cupl.edu.cn/connect/qrpage",
        appid: "d8a8fc4a96d64f29bbe454c61e7fa986",
        return_url: retUrl,
        rand_token: "91dae4940902460213ddd7fb771d0c04",
        width: "300px",
        height: "400px",
    };

    masLogin(objLogin);
}

/*
var orgHomeFunc = null;

function hookHome() {
    if(orgHomeFunc != null) {
        orgHomeFunc();
    }
    microLogin('wxLoginImg');
}


if(typeof home === "function") {
    orgHomeFunc = home;
    home = hookHome;
} else {
    microLogin('wxLoginImg');
}*/