Browser detect object

browser.js

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();

global.js

if (_brow.browser == 'Explorer' && _brow.version == 8) {
  $('body').addClass('ie8');
}