detect browser

BrowserDetect.js

/*
    BrowserDetect.browser == 'Explorer';
    BrowserDetect.version <= 8;
*/
var BrowserDetect =
{
    init: function () {
        this.browser = this.searchString(this.dataBrowser) || "Other";
        this.version = this.searchVersion(navigator.userAgent) || this.searchVersion(navigator.appVersion) || "Unknown";
    },

    searchString: function (data) {
        for (var i = 0 ; i < data.length ; i++) {
            var dataString = data[i].string;
            this.versionSearchString = data[i].subString;

            if (dataString.indexOf(data[i].subString) != -1) {
                return data[i].identity;
            }
        }
    },

    searchVersion: function (dataString) {
        var index = dataString.indexOf(this.versionSearchString);
        if (index == -1) return;
        return parseFloat(dataString.substring(index + this.versionSearchString.length + 1));
    },

    dataBrowser:
    [
        { string: navigator.userAgent, subString: "Chrome", identity: "Chrome" },
        { string: navigator.userAgent, subString: "MSIE", identity: "Explorer" },
        { string: navigator.userAgent, subString: "Firefox", identity: "Firefox" },
        { string: navigator.userAgent, subString: "Safari", identity: "Safari" },
        { string: navigator.userAgent, subString: "Opera", identity: "Opera" }
    ]

};
BrowserDetect.init();

//ie8 fix
    if (BrowserDetect.browser == 'Explorer' && BrowserDetect.version <= 8) {
        //alert("ie");
    }