Agents.js (modify code jquery browser)

Agents.js

var Agents = (function(window) {
    var userAgent = window.navigator.userAgent.toLowerCase();

    var match = /(chrome)[ \/]([\w.]+)/.exec(userAgent) ||
            /(webkit)[ \/]([\w.]+)/.exec(userAgent) ||
            /(opera)(?:.*version|)[ \/]([\w.]+)/.exec(userAgent) ||
            /(msie) ([\w.]+)/.exec(userAgent) ||
            userAgent.indexOf('compatible') < 0 && /(mozilla)(?:.*? rv:([\w.]+)|)/.exec(userAgent) || [];

    var platformMatch = /(ipad)/.exec(userAgent) ||
            /(iphone)/.exec(userAgent) ||
            /(android)/.exec(userAgent) || [];

    var name = match[1] || '';
    var version = match[2] || '';
    var platform = platformMatch[0] || '';
    var engine = '';

    if (name === 'chrome') {
        engine = 'webkit';
    } else if (name === 'webkit') {
        name = 'safari';
        engine = 'webkit';
    } else if (name === 'mozilla') {
        name = 'firefox';
        engine = 'mozilla';
    } else if (name === 'msie') {
        engine = 'trident';
    }

    var isChrome = (name === 'chrome');
    var isFirefox = (name === 'firefox');
    var isMSIE = (name === 'msie');
    var isSafari = (name === 'safari');
    var isWebkit = (engine === 'webkit');
    var isTrident = (engine === 'trident');
    var isMozilla = (engine === 'mozilla');

    return{
        getName: function() {
            return name;
        },
        getVersion: function() {
            return version;
        },
        getPlatform: function() {
            return platform;
        },
        getEngine: function() {
            return engine;
        },
        isChrome: function() {
            return isChrome;
        },
        isFirefox: function() {
            return isFirefox;
        },
        isMSIE: function() {
            return isMSIE;
        },
        isSafari: function() {
            return isSafari;
        },
        isWebkit: function() {
            return isWebkit;
        },
        isTrident: function() {
            return isTrident;
        },
        isMozilla: function() {
            return isMozilla;
        }
    };
})(window);

/**
* example to use
*
* Agents.getName();
* Agents.getVersion();
* Agents.getPlatform();
* Agents.getEngine();
*
* Agents.isChrome();
* Agents.isFirefox();
* Agents.isMSIE();
* Agents.isSafari();
*
* Agents.isWebkit();
* Agents.isTrident();
* Agents.isMozilla();
*/

thank you :  http://api.jquery.com/jQuery.browser/