Mootools' browser detection

browser_detection.js

var browser = (function () {
    var ua = navigator.userAgent.toLowerCase(),
        platform = navigator.platform.toLowerCase(),
        UA = ua.match(/(opera|ie|firefox|chrome|version)[\s\/:]([\w\d\.]+)?.*?(safari|version[\s\/:]([\w\d\.]+)|$)/) || [null, 'unknown', 0],
        mode = UA[1] === 'ie' && document.documentMode,
        name = (UA[1] === 'version') ? UA[3] : UA[1],
        version = mode || parseFloat((UA[1] === 'opera' && UA[4]) ? UA[4] : UA[2]),
        browser;

    return {
        browserName : (name === 'ie') ? 'Microsoft Internet Explorer' : name.charAt(0).toUpperCase() + name.slice(1),
        majorVersion: parseInt(version, 10),
        platform: ua.match(/ip(?:ad|od|hone)/) ? 'ios' : (ua.match(/(?:webos|android)/) || platform.match(/mac|win|linux/) || ['other'])[0]
    };

}());