Apple's Browser Detection Script - prettified from http://images.apple.com/global/scripts/browserdetect.js

browserdetect.js

if (typeof (AC) === "undefined") {
    AC = {}
}
AC.Detector = {
    getAgent: function () {
        return navigator.userAgent.toLowerCase()
    },
    isMac: function (c) {
        var d = c || this.getAgent();
        return !!d.match(/mac/i)
    },
    isSnowLeopard: function (c) {
        if (typeof console != "undefined") {
            console.warn('Instead of AC.Detector.isSnowLeopard, please use AC.Detector.macOSAtLeastVersion("10.6").')
        }
        var d = c || this.getAgent();
        return !!d.match(/mac os x 10_6/i)
    },
    macOSVersion: function (g) {
        var h = g || this.getAgent();
        if (!this.isMac(h)) {
            return null
        }
        var f = h.match(/(mac os x )([\d\._]*)/i);
        if (f == null) {
            return f
        }
        if ( !! f[2].match(/\./)) {
            f = f[2].split(".")
        } else {
            f = f[2].split("_")
        }
        for (var e = 0; e < f.length;
        e++) {
            f[e] = parseInt(f[e])
        }
        return f
    },
    macOSAtLeastVersion: function (h, i) {
        if (typeof h == "undefined") {
            return false
        }
        var g = this.macOSVersion(i);
        if (g == null) {
            return false
        }
        if (typeof h == "string") {
            h = h.replace(".", "_").split("_")
        }
        for (var j = 0; j < h.length; j++) {
            var f = parseInt(g[j]);
            if (isNaN(f)) {
                f = 0
            }
            if (parseInt(h[j]) > f) {
                return false
            }
        }
        return true
    },
    isWin: function (c) {
        var d = c || this.getAgent();
        return !!d.match(/win/i)
    },
    winVersion: function (f) {
        var d = f || this.getAgent();
        if (this.isWin(d)) {
            var e = d.match(/nt\s*([\d\.]*)/);
            if (e && e[1]) {
                return parseFloat(e[1])
            }
            return true
        }
        return false
    },
    winAtLeastVersion: function (f, d) {
        if (typeof f == "undefined") {
            return false
        }
        f = parseFloat(f);
        if (f === NaN) {
            return false
        }
        var e = this.winVersion(d);
        if (e === null || e === false || e === true) {
            return false
        }
        return (f <= e)
    },
    isWin2k: function (c) {
        var d = c || this.getAgent();
        return this.isWin(d) && (d.match(/nt\s*5/i))
    },
    isWinVista: function (c) {
        var d = c || this.getAgent();
        return this.isWin(d) && (d.match(/nt\s*6\.0([0-9]{0,2})?/i))
    },
    isWebKit: function (c) {
        if (this._isWebKit === undefined) {
            var d = c || this.getAgent();
            this._isWebKit = !! d.match(/AppleWebKit/i);
            this.isWebKit = function () {
                return this._isWebKit
            }
        }
        return this._isWebKit
    },
    isSafari2: function (f) {
        if (typeof console != "undefined") {
            console.warn("Instead of AC.Detector.isSafari2(), please use AC.Detector.isWebKit().")
        }
        var d = f || this.getAgent();
        if (this._isSafari2 === undefined) {
            if (!this.isWebKit(d)) {
                this._isSafari2 = false
            } else {
                var e = parseInt(parseFloat(d.substring(d.lastIndexOf("safari/") + 7)), 10);
                this._isSafari2 = (e >= 419)
            }
            this.isSafari2 = function () {
                return this._isSafari2
            }
        }
        return this._isSafari2
    },
    isChrome: function (c) {
        if (this._isChrome === undefined) {
            var d = c || this.getAgent();
            this._isChrome = !! d.match(/Chrome/i);
            this.isChrome = function () {
                return this._isChrome
            }
        }
        return this._isChrome
    },
    isiPhone: function (c) {
        if (typeof console != "undefined") {
            console.warn("Instead of AC.Detector.isiPhone(), please use AC.Detector.isMobile().")
        }
        var d = c || this.getAgent();
        return this.isMobile(d)
    },
    iPhoneOSVersion: function (k) {
        if (typeof console != "undefined") {
            console.warn("Instead of AC.Detector.iPhoneOSVersion(), please use AC.Detector.iOSVersion().")
        }
        var l = k || this.getAgent(),
            h = this.isMobile(l),
            j, i, g;
        if (h) {
            var j = l.match(/.*CPU ([\w|\s]+) like/i);
            if (j && j[1]) {
                i = j[1].split(" ");
                g = i[2].split("_");
                return g
            } else {
                return [1]
            }
        }
        return null
    },
    isiPad: function (c) {
        var d = c || this.getAgent();
        return !!(this.isWebKit(d) && d.match(/ipad/i))
    },
    isMobile: function (c) {
        var d = c || this.getAgent();
        return this.isWebKit(d) && (d.match(/Mobile/i) && !this.isiPad(d))
    },
    _iOSVersion: null,
    iOSVersion: function () {
        if (this._iOSVersion === null) {
            this._iOSVersion = (AC.Detector.isMobile() || AC.Detector.isiPad()) ? parseFloat(navigator.userAgent.match(/os ([\d_]*)/i)[1].replace("_", ".")) : false
        }
        return this._iOSVersion
    },
    isOpera: function (c) {
        var d = c || this.getAgent();
        return !!d.match(/opera/i)
    },
    isIE: function (c) {
        var d = c || this.getAgent();
        return !!d.match(/msie/i)
    },
    isIEStrict: function (c) {
        var d = c || this.getAgent();
        return d.match(/msie/i) && !this.isOpera(d)
    },
    isIE8: function (f) {
        var d = f || this.getAgent();
        var e = d.match(/msie\D*([\.\d]*)/i);
        if (e && e[1]) {
            version = e[1]
        }
        return (+version >= 8)
    },
    isFirefox: function (c) {
        var d = c || this.getAgent();
        return !!d.match(/firefox/i)
    },
    isiTunesOK: function (c) {
        var d = c || this.getAgent();
        if (this.isMac(d)) {
            return true
        }
        if (this.winAtLeastVersion(5.1, d)) {
            return true
        }
        return false
    },
    _isQTInstalled: undefined,
    isQTInstalled: function () {
        if (this._isQTInstalled === undefined) {
            var e = false;
            if (navigator.plugins && navigator.plugins.length) {
                for (var d = 0; d < navigator.plugins.length;
                d++) {
                    var f = navigator.plugins[d];
                    if (f.name.indexOf("QuickTime") > -1) {
                        e = true
                    }
                }
            } else {
                if (typeof (execScript) != "undefined") {
                    qtObj = false;
                    execScript('on error resume next: qtObj = IsObject(CreateObject("QuickTimeCheckObject.QuickTimeCheck.1"))', "VBScript");
                    e = qtObj
                }
            }
            this._isQTInstalled = e
        }
        return this._isQTInstalled
    },
    getQTVersion: function () {
        var f = "0";
        if (navigator.plugins && navigator.plugins.length) {
            for (var h = 0; h < navigator.plugins.length;
            h++) {
                var g = navigator.plugins[h];
                var e = g.name.match(/quicktime\D*([\.\d]*)/i);
                if (e && e[1]) {
                    f = e[1]
                }
            }
        } else {
            if (typeof (execScript) != "undefined") {
                ieQTVersion = null;
                execScript('on error resume next: ieQTVersion = CreateObject("QuickTimeCheckObject.QuickTimeCheck.1").QuickTimeVersion', "VBScript");
                if (ieQTVersion) {
                    f = ieQTVersion.toString(16);
                    f = [f.charAt(0), f.charAt(1), f.charAt(2)].join(".")
                }
            }
        }
        return f
    },
    isQTCompatible: function (j, h) {
        function f(c, a) {
            var d = parseInt(c[0], 10);
            if (isNaN(d)) {
                d = 0
            }
            var b = parseInt(a[0], 10);
            if (isNaN(b)) {
                b = 0
            }
            if (d === b) {
                if (c.length > 1) {
                    return f(c.slice(1), a.slice(1))
                } else {
                    return true
                }
            } else {
                if (d < b) {
                    return true
                } else {
                    return false
                }
            }
        }
        var i = j.split(/\./);
        var g = h ? h.split(/\./) : this.getQTVersion().split(/\./);
        return f(i, g)
    },
    isValidQTAvailable: function (b) {
        return this.isQTInstalled() && this.isQTCompatible(b)
    },
    isSBVDPAvailable: function (b) {
        return false
    },
    _svgAsBackground: null,
    svgAsBackground: function (f) {
        if (this._svgAsBackground === null) {
            var d = function () {
                    AC.Detector._svgAsBackground = true;
                    if (typeof (f) == "function") {
                        f()
                    }
                };
            var e = document.createElement("img");
            e.setAttribute("src", "data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIyNzUiIGhlaWdodD0iMjc1Ij48L3N2Zz4%3D");
            if (e.complete) {
                e.style.visibility = "hidden";
                e.style.position = "absolute";
                document.body.appendChild(e);
                window.setTimeout(function () {
                    AC.Detector._svgAsBackground = false;
                    if (e.width >= 100) {
                        document.body.removeChild(e);
                        d()
                    } else {
                        document.body.removeChild(e)
                    }
                }, 1)
            } else {
                this._svgAsBackground = false;
                e.onload = d
            }
        } else {
            if (this._svgAsBackground && typeof (f) == "function") {
                f()
            }
        }
        return this._svgAsBackground
    },
    _style: null,
    _prefixes: null,
    _preFixes: null,
    _css: null,
    isCSSAvailable: function (i) {
        if (!this._style) {
            this._style = document.createElement("browserdetect").style
        }
        if (!this._prefixes) {
            this._prefixes = "-webkit- -moz- -o- -ms- -khtml- ".split(" ")
        }
        if (!this._preFixes) {
            this._preFixes = "Webkit Moz O ms Khtml ".split(" ")
        }
        if (!this._css) {
            this._css = {}
        }
        i = i.replace(/([A-Z]+)([A-Z][a-z])/g, "$1-$2").replace(/([a-z\d])([A-Z])/g, "$1-$2").replace(/^(\-*webkit|\-*moz|\-*o|\-*ms|\-*khtml)\-/, "").toLowerCase();
        switch (i) {
        case "gradient":
            if (this._css.gradient !== undefined) {
                return this._css.gradient
            }
            var i = "background-image:",
                l = "gradient(linear,left top,right bottom,from(#9f9),to(white));",
                m = "linear-gradient(left top,#9f9, white);";
            this._style.cssText = (i + this._prefixes.join(l + i) + this._prefixes.join(m + i)).slice(0, -i.length);
            this._css.gradient = (this._style.backgroundImage.indexOf("gradient") !== -1);
            return this._css.gradient;
        case "inset-box-shadow":
            if (this._css["inset-box-shadow"] !== undefined) {
                return this._css["inset-box-shadow"]
            }
            var i = "box-shadow:",
                j = "#fff 0 1px 1px inset;";
            this._style.cssText = this._prefixes.join(i + j);
            this._css["inset-box-shadow"] = (this._style.cssText.indexOf("inset") !== -1);
            return this._css["inset-box-shadow"];
        default:
            var n = i.split("-"),
                r = n.length,
                o, p, q;
            if (n.length > 0) {
                i = n[0];
                for (p = 1; p < r; p++) {
                    i += n[p].substr(0, 1).toUpperCase() + n[p].substr(1)
                }
            }
            o = i.substr(0, 1).toUpperCase() + i.substr(1);
            if (this._css[i] !== undefined) {
                return this._css[i]
            }
            for (q = this._preFixes.length - 1; q >= 0; q--) {
                if (this._style[this._preFixes[q] + i] !== undefined || this._style[this._preFixes[q] + o] !== undefined) {
                    this._css[i] = true;
                    return true
                }
            }
            return false
        }
        return false
    },
    _supportsThreeD: false,
    supportsThreeD: function () {
        try {
            this._supportsThreeD = false;
            if ("styleMedia" in window) {
                this._supportsThreeD = window.styleMedia.matchMedium("(-webkit-transform-3d)")
            } else {
                if ("media" in window) {
                    this._supportsThreeD = window.media.matchMedium("(-webkit-transform-3d)")
                }
            }
            if (!this._supportsThreeD) {
                if (!document.getElementById("supportsThreeDStyle")) {
                    var d = document.createElement("style");
                    d.id = "supportsThreeDStyle";
                    d.textContent = "@media (transform-3d),(-o-transform-3d),(-moz-transform-3d),(-ms-transform-3d),(-webkit-transform-3d) { #supportsThreeD { height:3px } }";
                    document.querySelector("head").appendChild(d)
                }
                if (!(div = document.querySelector("#supportsThreeD"))) {
                    div = document.createElement("div");
                    div.id = "supportsThreeD";
                    document.body.appendChild(div)
                }
                this._supportsThreeD = (div.offsetHeight === 3)
            }
            return this._supportsThreeD
        } catch (c) {
            return false
        }
    },
    _hasGyro: null,
    _testingForGyro: false,
    hasGyro: function () {
        if (this._hasGyro !== null) {
            return this._hasGyro
        }
        if ("DeviceOrientationEvent" in window && window.DeviceOrientationEvent !== null) {
            if (this._testingForGyro === false) {
                this._testingForGyro = true;
                var b = this;
                this.boundTestingForGyro = function (a) {
                    b.testingForGyro(a)
                };
                window.addEventListener("deviceorientation", this.boundTestingForGyro, true);
                this._testGyroTimeout = window.setTimeout(function () {
                    this._hasGyro = false
                }.bind(this), 250)
            }
            return this._hasGyro
        } else {
            return this._hasGyro = false
        }
    },
    testingForGyro: function (b) {
        if (this._hasGyro === false) {
            return this._hasGyro
        } else {
            if (typeof b.gamma !== "undefined" && typeof b.beta !== "undefined") {
                this._hasGyro = true
            } else {
                this._hasGyro = false
            }
            window.clearTimeout(this._testGyroTimeout);
            window.removeEventListener("deviceorientation", this.boundTestingForGyro, true);
            delete this.boundTestingForGyro
        }
    },
    _isiPadWithGyro: null,
    isiPadWithGyro: function () {
        if (this._isiPadWithGyro === false || !this.isiPad()) {
            return false
        } else {
            return this._isiPadWithGyro = this.hasGyro()
        }
    },
    _hasLocalStorage: null,
    hasLocalStorage: function () {
        if (this._hasLocalStorage !== null) {
            return this._hasLocalStorage
        }
        try {
            if (typeof localStorage !== "undefined" && "setItem" in localStorage) {
                localStorage.setItem("ac_browser_detect", "test");
                this._hasLocalStorage = true;
                localStorage.removeItem("ac_browser_detect", "test")
            } else {
                this._hasLocalStorage = false
            }
        } catch (b) {
            this._hasLocalStorage = false
        }
        return this._hasLocalStorage
    },
    _hasSessionStorage: null,
    hasSessionStorage: function () {
        if (this._hasSessionStorage !== null) {
            return this._hasSessionStorage
        }
        try {
            if (typeof sessionStorage !== "undefined" && "setItem" in sessionStorage) {
                sessionStorage.setItem("ac_browser_detect", "test");
                this._hasSessionStorage = true;
                sessionStorage.removeItem("ac_browser_detect", "test")
            } else {
                this._hasSessionStorage = false
            }
        } catch (b) {
            this._hasSessionStorage = false
        }
        return this._hasSessionStorage
    },
    _hasCookies: null,
    hasCookies: function () {
        if (this._hasCookies !== null) {
            return this._hasCookies
        }
        this._hasCookies = ("cookie" in document && !! navigator.cookieEnabled) ? true : false;
        return this._hasCookies
    }
};