var checkBrowser = {

    init: function () {

        this.browser = this.searchStr(this.browserList) || "An unknown browser";

        this.version = this.searchVer(navigator.userAgent)

            || this.searchVer(navigator.appVersion)

            || "an unknown version";

        this.OS = this.searchStr(this.osList) || "an unknown OS";

    },

    searchStr: function (objList) {

        for (var i = 0; i < objList.length; i++) {

            var dataStr = objList[i].string;

            var dataProp = objList[i].prop;

            this.versionStr = objList[i].versionSearch || objList[i].identity;

            if (dataStr) {

                if (dataStr.indexOf(objList[i].subString) != -1)

                    return objList[i].identity;

            }

            else if (dataProp)

                return objList[i].identity;

        }

    },

    searchVer: function (str) {

        var idx = str.indexOf(this.versionStr);

        if (idx == -1) return;

        return parseFloat(str.substring(idx + this.versionStr.length + 1));

    },

    browserList: [

        {
            String: navigator.userAgent,

            subString: "OmniWeb",

            versionSearch: "OmniWeb/",

            identity: "OmniWeb"

        },

        {

            string: navigator.vendor,

            subString: "Apple",

            identity: "Safari"

        },

        {

            prop: window.opera,

            identity: "Opera"

        },

        {

            string: navigator.vendor,

            subString: "iCab",

            identity: "iCab"

        },

        {

            string: navigator.vendor,

            subString: "KDE",

            identity: "Konqueror"

        },

        {

            string: navigator.userAgent,

            subString: "Firefox",

            identity: "Firefox"

        },

        {

            string: navigator.vendor,

            subString: "Camino",

            identity: "Camino"

        },

        {       // for newer Netscapes (6+)

            string: navigator.userAgent,

            subString: "Netscape",

            identity: "Netscape"

        },

        {

            string: navigator.userAgent,

            subString: "MSIE",

            identity: "Explorer",

            versionSearch: "MSIE"

        },

        {

            string: navigator.userAgent,

            subString: "Trident",

            identity: "Explorer",

            versionSearch: "MSIE"

        },

        {

            string: navigator.userAgent,

            subString: "Gecko",

            identity: "Mozilla",

            versionSearch: "rv"

        },

        {       // for older Netscapes (4-)

            string: navigator.userAgent,

            subString: "Mozilla",

            identity: "Netscape",

            versionSearch: "Mozilla"

        }

    ],

    osList: [

        {

            string: navigator.platform,

            subString: "Win",

            identity: "Windows"

        },

        {

            string: navigator.platform,

            subString: "Mac",

            identity: "Mac"

        },

        {

            string: navigator.platform,

            subString: "Linux",

            identity: "Linux"

        }

    ]


};

checkBrowser.init();