var Detect = {
    ieVer: 9.0,

    teVer: 7.4,

    sgVer: "66",

    detectIE: function () {
        var isIE = !!window.ActiveXObject || "ActiveXObject" in window;
        if (!isIE) {
            alert("请使用含有 IE核心 的浏览器！");
            return false;
        }

        var ieVer = this.getIEVer();
        if (ieVer < this.ieVer) {
            alert("请使用 IE " + this.ieVer + " 或 更高版本！");
            return false;
        }

        var flag = this.detectTE();
        if (!flag) {
            return false;
        }

        return true;
    },

    getIEVer: function () {
        var agent = window.navigator.userAgent.toLowerCase();
        var msie = agent.indexOf("msie ");
        if (msie > -1) {
            return parseFloat(agent.substring(msie + 5, agent.indexOf(";", msie)));
        }

        return 11;
    },

    detectTE: function () {
        try {
            var sg = this.getSG();
            if (sg == null) {
                return false;
            }

            //var test = new ActiveXObject("TEDetect.TETest"); if (!test || test.Type == "NA") return false;
            var ver = parseFloat(sg.Version.Major + "." + sg.Version.Minor);
            if (ver < this.teVer) {
                alert("请使用 Skyline Globe " + this.teVer + " 或 更高版本！");
                return false;
            }

            if (ver >= 7.4) {
                this.sgVer = "74";
            } else if (ver >= 7.1) {
                this.sgVer = "71";
            } else if (ver >= 7) {
                this.sgVer = "70";
            } else {
                this.sgVer = "66";
            }

            return true;
        } catch (e) {
            console.error(e);
        }

        return false;
    },

    getSG: function () {
        return TEWinEx.CreateInstance("TerraExplorerX.SGWorld" + this.sgVer);
    }
};