// A cross-browser javascript shim for html5 audio
(function(audiojs, audiojsInstance, container) {
    // Use the path to the audio.js file to create relative paths to the swf and player graphics
    // Remember that some systems (e.g. ruby on rails) append strings like '?1301478336' to asset paths
    var path = (function() {
      var re = new RegExp('audio(\.min)?\.js.*'),
          scripts = document.getElementsByTagName('script');
      for (var i = 0, ii = scripts.length; i < ii; i++) {
        var path = scripts[i].getAttribute('src');
        if(re.test(path))
        {
          var f = path.split ( '/' );
          f.pop ();
          return f.join ( '/' ) + '/';
        }
      }
      // when no script found, an empty string causes the least confusion.
      return '';
    })();
  
    // ##The audiojs interface
    // This is the global object which provides an interface for creating new `audiojs` instances.
    // It also stores all of the construction helper methods and variables.
    container[audiojs] = {
      instanceCount: 0,
      instances: {},
      // The markup for the swf. It is injected into the page if there is not support for the `<audio>` element. The `$n`s are placeholders.
      // `$1` The name of the flash movie
      // `$2` The path to the swf
      // `$3` Cache invalidation
      flashSource: '\
        <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" id="$1" width="1" height="1" name="$1" style="position: absolute; left: -1px;"> \
          <param name="movie" value="$2?playerInstance='+audiojs+'.instances[\'$1\']&datetime=$3"> \
          <param name="allowscriptaccess" value="always"> \
          <embed name="$1" src="$2?playerInstance='+audiojs+'.instances[\'$1\']&datetime=$3" width="1" height="1" allowscriptaccess="always"> \
        </object>',
  
      // ### The main settings object
      // Where all the default settings are stored. Each of these variables and methods can be overwritten by the user-provided `options` object.
      settings: {
        autoplay: false,
        loop: false,
        preload: true,
        imageLocation: path + 'player-graphics.gif',
        retinaImageLocation: path + 'player-graphics@2x.gif',
        swfLocation: path + 'audiojs.swf',
        useFlash: (function() {
          var a = document.createElement('audio');
          return !(a.canPlayType && a.canPlayType('audio/mpeg;').replace(/no/, ''));
        })(),
        hasFlash: (function() {
          if (navigator.plugins && navigator.plugins.length && navigator.plugins['Shockwave Flash']) {
            return true;
          } else if (navigator.mimeTypes && navigator.mimeTypes.length) {
            var mimeType = navigator.mimeTypes['application/x-shockwave-flash'];
            return mimeType && mimeType.enabledPlugin;
          } else {
            try {
              var ax = new ActiveXObject('ShockwaveFlash.ShockwaveFlash');
              return true;
            } catch (e) {}
          }
          return false;
        })(),
        // The default markup and classes for creating the player:
        createPlayer: {
          markup: '\
            <div class="play-pause"> \
              <p class="play"></p> \
              <p class="pause"></p> \
              <p class="loading"></p> \
              <p class="error"></p> \
            </div> \
            <div class="scrubber"> \
              <div class="progress"></div> \
              <div class="loaded"></div> \
            </div> \
            <div class="time"> \
              <em class="played">00:00</em>/<strong class="duration">00:00</strong> \
            </div> \
            <div class="error-message"></div>',
          playPauseClass: 'play-pause',
          scrubberClass: 'scrubber',
          progressClass: 'progress',
          loaderClass: 'loaded',
          timeClass: 'time',
          durationClass: 'duration',
          playedClass: 'played',
          errorMessageClass: 'error-message',
          playingClass: 'playing',
          loadingClass: 'loading',
          errorClass: 'error'
        },
        // The css used by the default player. This is is dynamically injected into a `<style>` tag in the top of the head.
        css: '\
          .audiojs audio { position: absolute; left: -1px; } \
          .audiojs { width: 460px; height: 36px; background: #404040; overflow: hidden; font-family: monospace; font-size: 12px; \
            background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0, #444), color-stop(0.5, #555), color-stop(0.51, #444), color-stop(1, #444)); \
            background-image: -moz-linear-gradient(center top, #444 0%, #555 50%, #444 51%, #444 100%); \
            -webkit-box-shadow: 1px 1px 8px rgba(0, 0, 0, 0.3); -moz-box-shadow: 1px 1px 8px rgba(0, 0, 0, 0.3); \
            -o-box-shadow: 1px 1px 8px rgba(0, 0, 0, 0.3); box-shadow: 1px 1px 8px rgba(0, 0, 0, 0.3); } \
          .audiojs .play-pause { width: 25px; height: 40px; padding: 4px 6px; margin: 0px; float: left; overflow: hidden; border-right: 1px solid #000; } \
          .audiojs p { display: none; width: 25px; height: 40px; margin: 0px; cursor: pointer; } \
          .audiojs .play { display: block; } \
          .audiojs .scrubber { position: relative; float: left; width: 280px; background: #5a5a5a; height: 14px; margin: 10px; border-top: 1px solid #3f3f3f; border-left: 0px; border-bottom: 0px; overflow: hidden; } \
          .audiojs .progress { position: absolute; top: 0px; left: 0px; height: 14px; width: 0px; background: #ccc; z-index: 1; \
            background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0, #ccc), color-stop(0.5, #ddd), color-stop(0.51, #ccc), color-stop(1, #ccc)); \
            background-image: -moz-linear-gradient(center top, #ccc 0%, #ddd 50%, #ccc 51%, #ccc 100%); } \
          .audiojs .loaded { position: absolute; top: 0px; left: 0px; height: 14px; width: 0px; background: #000; \
            background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0, #222), color-stop(0.5, #333), color-stop(0.51, #222), color-stop(1, #222)); \
            background-image: -moz-linear-gradient(center top, #222 0%, #333 50%, #222 51%, #222 100%); } \
          .audiojs .time { float: left; height: 36px; line-height: 36px; margin: 0px 0px 0px 6px; padding: 0px 6px 0px 12px; border-left: 1px solid #000; color: #ddd; text-shadow: 1px 1px 0px rgba(0, 0, 0, 0.5); } \
          .audiojs .time em { padding: 0px 2px 0px 0px; color: #f9f9f9; font-style: normal; } \
          .audiojs .time strong { padding: 0px 0px 0px 2px; font-weight: normal; } \
          .audiojs .error-message { float: left; display: none; margin: 0px 10px; height: 36px; width: 400px; overflow: hidden; line-height: 36px; white-space: nowrap; color: #fff; \
            text-overflow: ellipsis; -o-text-overflow: ellipsis; -icab-text-overflow: ellipsis; -khtml-text-overflow: ellipsis; -moz-text-overflow: ellipsis; -webkit-text-overflow: ellipsis; } \
          .audiojs .error-message a { color: #eee; text-decoration: none; padding-bottom: 1px; border-bottom: 1px solid #999; white-space: wrap; } \
          \
          .audiojs .play { background: url("$1") -2px -1px no-repeat; } \
          .audiojs .loading { background: url("$1") -2px -31px no-repeat; } \
          .audiojs .error { background: url("$1") -2px -61px no-repeat; } \
          .audiojs .pause { background: url("$1") -2px -91px no-repeat; } \
          \
          @media only screen and (-webkit-min-device-pixel-ratio: 2), \
            only screen and (min--moz-device-pixel-ratio: 2), \
            only screen and (min-moz-device-pixel-ratio: 2), \
            only screen and (-o-min-device-pixel-ratio: 2/1), \
            only screen and (min-device-pixel-ratio: 2) { \
              .audiojs .play, .audiojs .loading, .audiojs .error, .audiojs .pause { \
                background-image: url("$2"); \
                -webkit-background-size: 30px 120px; \
                -moz-background-size: 30px 120px; \
                -o-background-size: 30px 120px; \
                background-size: 30px 120px; \
              } \
          } \
          \
          .playing .play, .playing .loading, .playing .error { display: none; } \
          .playing .pause { display: block; } \
          \
          .loading .play, .loading .pause, .loading .error { display: none; } \
          .loading .loading { display: block; } \
          \
          .error .time, .error .play, .error .pause, .error .scrubber, .error .loading { display: none; } \
          .error .error { display: block; } \
          .error .play-pause p { cursor: auto; } \
          .error .error-message { display: block; }',
        // The default event callbacks:
        trackEnded: function(e) {},
        flashError: function() {
          var player = this.settings.createPlayer,
              errorMessage = getByClass(player.errorMessageClass, this.wrapper),
              html = 'Missing <a href="http://get.adobe.com/flashplayer/">flash player</a> plugin.';
          if (this.mp3) html += ' <a href="'+this.mp3+'">Download audio file</a>.';
          container[audiojs].helpers.removeClass(this.wrapper, player.loadingClass);
          container[audiojs].helpers.addClass(this.wrapper, player.errorClass);
          errorMessage.innerHTML = html;
        },
        loadError: function(e) {
          var player = this.settings.createPlayer,
              errorMessage = getByClass(player.errorMessageClass, this.wrapper);
          container[audiojs].helpers.removeClass(this.wrapper, player.loadingClass);
          container[audiojs].helpers.addClass(this.wrapper, player.errorClass);
          errorMessage.innerHTML = 'Error loading: "'+this.mp3+'"';
        },
        init: function() {
          var player = this.settings.createPlayer;
          container[audiojs].helpers.addClass(this.wrapper, player.loadingClass);
        },
        loadStarted: function() {
          var player = this.settings.createPlayer,
              duration = getByClass(player.durationClass, this.wrapper),
              m = Math.floor(this.duration / 60),
              s = Math.floor(this.duration % 60);
          container[audiojs].helpers.removeClass(this.wrapper, player.loadingClass);
          duration.innerHTML = ((m<10?'0':'')+m+':'+(s<10?'0':'')+s);
        },
        loadProgress: function(percent) {
          var player = this.settings.createPlayer,
              loaded = getByClass(player.loaderClass, this.wrapper);
          loaded.style.width = Math.round(100 * percent) + '%';
        },
        playPause: function() {
          if (this.playing) this.settings.play();
          else this.settings.pause();
        },
        play: function() {
          var player = this.settings.createPlayer;
          container[audiojs].helpers.removeClass(this.wrapper, player.errorClass);
          container[audiojs].helpers.addClass(this.wrapper, player.playingClass);
        },
        pause: function() {
          var player = this.settings.createPlayer;
          container[audiojs].helpers.removeClass(this.wrapper, player.playingClass);
        },
        updatePlayhead: function(percent) {
          var player = this.settings.createPlayer,
              progress = getByClass(player.progressClass, this.wrapper);
          progress.style.width = Math.round(100 * percent) + '%';
  
          var played = getByClass(player.playedClass, this.wrapper),
              p = this.duration * percent,
              m = Math.floor(p / 60),
              s = Math.floor(p % 60);
          played.innerHTML = ((m<10?'0':'')+m+':'+(s<10?'0':'')+s);
        }
      },
  
      // ### Contructor functions
  
      // `create()`
      // Used to create a single `audiojs` instance.
      // If an array is passed then it calls back to `createAll()`.
      // Otherwise, it creates a single instance and returns it.
      create: function(element, options) {
        var options = options || {}
        if (element.length) {
          return this.createAll(options, element);
        } else {
          return this.newInstance(element, options);
        }
      },
  
      // `createAll()`
      // Creates multiple `audiojs` instances.
      // If `elements` is `null`, then automatically find any `<audio>` tags on the page and create `audiojs` instances for them.
      createAll: function(options, elements) {
        var audioElements = elements || document.getElementsByTagName('audio'),
            instances = []
            options = options || {};
        for (var i = 0, ii = audioElements.length; i < ii; i++) {
          
          if ((" " + audioElements[i].parentNode.className + " ").replace(/[\n\t]/g, " ").indexOf(" audiojs ") > -1)
            continue;
            
          instances.push(this.newInstance(audioElements[i], options));
        }
        return instances;
      },
  
      // ### Creating and returning a new instance
      // This goes through all the steps required to build out a usable `audiojs` instance.
      newInstance: function(element, options) {
        var element = element,
            s = this.helpers.clone(this.settings),
            id = 'audiojs'+this.instanceCount,
            wrapperId = 'audiojs_wrapper'+this.instanceCount,
            instanceCount = this.instanceCount++;
  
        // Check for `autoplay`, `loop` and `preload` attributes and write them into the settings.
        if (element.getAttribute('autoplay') != null) s.autoplay = true;
        if (element.getAttribute('loop') != null) s.loop = true;
        if (element.getAttribute('preload') == 'none') s.preload = false;
        // Merge the default settings with the user-defined `options`.
        if (options) this.helpers.merge(s, options);
  
        // Inject the player html if required.
        if (s.createPlayer.markup) element = this.createPlayer(element, s.createPlayer, wrapperId);
        else element.parentNode.setAttribute('id', wrapperId);
  
        // Return a new `audiojs` instance.
        var audio = new container[audiojsInstance](element, s);
  
        // If css has been passed in, dynamically inject it into the `<head>`.
        if (s.css) this.helpers.injectCss(audio, s.css);
  
        // If `<audio>` or mp3 playback isn't supported, insert the swf & attach the required events for it.
        if (s.useFlash && s.hasFlash) {
          this.injectFlash(audio, id);
          this.attachFlashEvents(audio.wrapper, audio);
        } else if (s.useFlash && !s.hasFlash) {
          s.flashError.apply(audio);
        }
  
        // Attach event callbacks to the new audiojs instance.
        if (!s.useFlash || (s.useFlash && s.hasFlash)) this.attachEvents(audio.wrapper, audio);
  
        // Store the newly-created `audiojs` instance.
        this.instances[id] = audio;
        return audio;
      },
  
      // ### Helper methods for constructing a working player
      // Inject a wrapping div and the markup for the html player.
      createPlayer: function(element, player, id) {
        var wrapper = document.createElement('div'),
            newElement = element.cloneNode(true);
        wrapper.setAttribute('class', 'audiojs');
        wrapper.setAttribute('className', 'audiojs');
        wrapper.setAttribute('id', id);
  
        // Fix IE's broken implementation of `innerHTML` & `cloneNode` for HTML5 elements.
        if (newElement.outerHTML && !document.createElement('audio').canPlayType) {
          newElement = this.helpers.cloneHtml5Node(element);
          wrapper.innerHTML = player.markup;
          wrapper.appendChild(newElement);
          element.outerHTML = wrapper.outerHTML;
          wrapper = document.getElementById(id);
        } else {
          wrapper.appendChild(newElement);
          wrapper.innerHTML = wrapper.innerHTML + player.markup;
          element.parentNode.replaceChild(wrapper, element);
        }
        return wrapper.getElementsByTagName('audio')[0];
      },
  
      // Attaches useful event callbacks to an `audiojs` instance.
      attachEvents: function(wrapper, audio) {
        if (!audio.settings.createPlayer) return;
        var player = audio.settings.createPlayer,
            playPause = getByClass(player.playPauseClass, wrapper),
            scrubber = getByClass(player.scrubberClass, wrapper);
  
        container[audiojs].events.addListener(playPause, 'click', function(e) {
          audio.playPause.apply(audio);
        });
  
        container[audiojs].events.addListener(scrubber, 'click', function(e) {
          var relativeLeft = e.clientX - this.getBoundingClientRect().left;
          audio.skipTo(relativeLeft / scrubber.offsetWidth);
        });
  
        // _If flash is being used, then the following handlers don't need to be registered._
        if (audio.settings.useFlash) return;
  
        // Start tracking the load progress of the track.
        container[audiojs].events.trackLoadProgress(audio);
  
        container[audiojs].events.addListener(audio.element, 'timeupdate', function(e) {
          audio.updatePlayhead.apply(audio);
        });
  
        container[audiojs].events.addListener(audio.element, 'ended', function(e) {
          audio.trackEnded.apply(audio);
        });
  
        container[audiojs].events.addListener(audio.source, 'error', function(e) {
          // on error, cancel any load timers that are running.
          clearInterval(audio.readyTimer);
          clearInterval(audio.loadTimer);
          audio.settings.loadError.apply(audio);
        });
  
      },
  
      // Flash requires a slightly different API to the `<audio>` element, so this method is used to overwrite the standard event handlers.
      attachFlashEvents: function(element, audio) {
        audio['swfReady'] = false;
        audio['load'] = function(mp3) {
          // If the swf isn't ready yet then just set `audio.mp3`. `init()` will load it in once the swf is ready.
          audio.mp3 = mp3;
          if (audio.swfReady) audio.element.load(mp3);
        }
        audio['loadProgress'] = function(percent, duration) {
          audio.loadedPercent = percent;
          audio.duration = duration;
          audio.settings.loadStarted.apply(audio);
          audio.settings.loadProgress.apply(audio, [percent]);
        }
        audio['skipTo'] = function(percent) {
          if (percent > audio.loadedPercent) return;
          audio.updatePlayhead.call(audio, [percent])
          audio.element.skipTo(percent);
        }
        audio['updatePlayhead'] = function(percent) {
          audio.settings.updatePlayhead.apply(audio, [percent]);
        }
        audio['play'] = function() {
          // If the audio hasn't started preloading, then start it now.
          // Then set `preload` to `true`, so that any tracks loaded in subsequently are loaded straight away.
          if (!audio.settings.preload) {
            audio.settings.preload = true;
            audio.element.init(audio.mp3);
          }
          audio.playing = true;
          // IE doesn't allow a method named `play()` to be exposed through `ExternalInterface`, so lets go with `pplay()`.
          // <http://dev.nuclearrooster.com/2008/07/27/externalinterfaceaddcallback-can-cause-ie-js-errors-with-certain-keyworkds/>
          audio.element.pplay();
          audio.settings.play.apply(audio);
        }
        audio['pause'] = function() {
          audio.playing = false;
          // Use `ppause()` for consistency with `pplay()`, even though it isn't really required.
          audio.element.ppause();
          audio.settings.pause.apply(audio);
        }
        audio['setVolume'] = function(v) {
          audio.element.setVolume(v);
        }
        audio['loadStarted'] = function() {
          // Load the mp3 specified by the audio element into the swf.
          audio.swfReady = true;
          if (audio.settings.preload) audio.element.init(audio.mp3);
          if (audio.settings.autoplay) audio.play.apply(audio);
        }
      },
  
      // ### Injecting an swf from a string
      // Build up the swf source by replacing the `$keys` and then inject the markup into the page.
      injectFlash: function(audio, id) {
        var flashSource = this.flashSource.replace(/\$1/g, id);
        flashSource = flashSource.replace(/\$2/g, audio.settings.swfLocation);
        // `(+new Date)` ensures the swf is not pulled out of cache. The fixes an issue with Firefox running multiple players on the same page.
        flashSource = flashSource.replace(/\$3/g, (+new Date + Math.random()));
        // Inject the player markup using a more verbose `innerHTML` insertion technique that works with IE.
        var html = audio.wrapper.innerHTML,
            div = document.createElement('div');
        div.innerHTML = flashSource + html;
        audio.wrapper.innerHTML = div.innerHTML;
        audio.element = this.helpers.getSwf(id);
      },
  
      // ## Helper functions
      helpers: {
        // **Merge two objects, with `obj2` overwriting `obj1`**
        // The merge is shallow, but that's all that is required for our purposes.
        merge: function(obj1, obj2) {
          for (attr in obj2) {
            if (obj1.hasOwnProperty(attr) || obj2.hasOwnProperty(attr)) {
              obj1[attr] = obj2[attr];
            }
          }
        },
        // **Clone a javascript object (recursively)**
        clone: function(obj){
          if (obj == null || typeof(obj) !== 'object') return obj;
          var temp = new obj.constructor();
          for (var key in obj) temp[key] = arguments.callee(obj[key]);
          return temp;
        },
        // **Adding/removing classnames from elements**
        addClass: function(element, className) {
          var re = new RegExp('(\\s|^)'+className+'(\\s|$)');
          if (re.test(element.className)) return;
          element.className += ' ' + className;
        },
        removeClass: function(element, className) {
          var re = new RegExp('(\\s|^)'+className+'(\\s|$)');
          element.className = element.className.replace(re,' ');
        },
        // **Dynamic CSS injection**
        // Takes a string of css, inserts it into a `<style>`, then injects it in at the very top of the `<head>`. This ensures any user-defined styles will take precedence.
        injectCss: function(audio, string) {
  
          // If an `audiojs` `<style>` tag already exists, then append to it rather than creating a whole new `<style>`.
          var prepend = '',
              styles = document.getElementsByTagName('style'),
              css = string.replace(/\$1/g, audio.settings.imageLocation);
              css = css.replace(/\$2/g, audio.settings.retinaImageLocation);
  
          for (var i = 0, ii = styles.length; i < ii; i++) {
            var title = styles[i].getAttribute('title');
            if (title && ~title.indexOf('audiojs')) {
              style = styles[i];
              if (style.innerHTML === css) return;
              prepend = style.innerHTML;
              break;
            }
          };
  
          var head = document.getElementsByTagName('head')[0],
              firstchild = head.firstChild,
              style = document.createElement('style');
  
          if (!head) return;
  
          style.setAttribute('type', 'text/css');
          style.setAttribute('title', 'audiojs');
  
          if (style.styleSheet) style.styleSheet.cssText = prepend + css;
          else style.appendChild(document.createTextNode(prepend + css));
  
          if (firstchild) head.insertBefore(style, firstchild);
          else head.appendChild(style);
        },
        // **Handle all the IE6+7 requirements for cloning `<audio>` nodes**
        // Create a html5-safe document fragment by injecting an `<audio>` element into the document fragment.
        cloneHtml5Node: function(audioTag) {
          var fragment = document.createDocumentFragment(),
              doc = fragment.createElement ? fragment : document;
          doc.createElement('audio');
          var div = doc.createElement('div');
          fragment.appendChild(div);
          div.innerHTML = audioTag.outerHTML;
          return div.firstChild;
        },
        // **Cross-browser `<object>` / `<embed>` element selection**
        getSwf: function(name) {
          var swf = document[name] || window[name];
          return swf.length > 1 ? swf[swf.length - 1] : swf;
        }
      },
      // ## Event-handling
      events: {
        memoryLeaking: false,
        listeners: [],
        // **A simple cross-browser event handler abstraction**
        addListener: function(element, eventName, func) {
          // For modern browsers use the standard DOM-compliant `addEventListener`.
          if (element.addEventListener) {
            element.addEventListener(eventName, func, false);
            // For older versions of Internet Explorer, use `attachEvent`.
            // Also provide a fix for scoping `this` to the calling element and register each listener so the containing elements can be purged on page unload.
          } else if (element.attachEvent) {
            this.listeners.push(element);
            if (!this.memoryLeaking) {
              window.attachEvent('onunload', function() {
                if(this.listeners) {
                  for (var i = 0, ii = this.listeners.length; i < ii; i++) {
                    container[audiojs].events.purge(this.listeners[i]);
                  }
                }
              });
              this.memoryLeaking = true;
            }
            element.attachEvent('on' + eventName, function() {
              func.call(element, window.event);
            });
          }
        },
  
        trackLoadProgress: function(audio) {
          // If `preload` has been set to `none`, then we don't want to start loading the track yet.
          if (!audio.settings.preload) return;
  
          var readyTimer,
              loadTimer,
              audio = audio,
              ios = (/(ipod|iphone|ipad)/i).test(navigator.userAgent);
  
          // Use timers here rather than the official `progress` event, as Chrome has issues calling `progress` when loading mp3 files from cache.
          readyTimer = setInterval(function() {
            if (audio.element.readyState > -1) {
              // iOS doesn't start preloading the mp3 until the user interacts manually, so this stops the loader being displayed prematurely.
              if (!ios) audio.init.apply(audio);
            }
            if (audio.element.readyState > 1) {
              if (audio.settings.autoplay) audio.play.apply(audio);
              clearInterval(readyTimer);
              // Once we have data, start tracking the load progress.
              loadTimer = setInterval(function() {
                audio.loadProgress.apply(audio);
                if (audio.loadedPercent >= 1) clearInterval(loadTimer);
              }, 200);
            }
          }, 200);
          audio.readyTimer = readyTimer;
          audio.loadTimer = loadTimer;
        },
  
        // **Douglas Crockford's IE6 memory leak fix**
        // <http://javascript.crockford.com/memory/leak.html>
        // This is used to release the memory leak created by the circular references created when fixing `this` scoping for IE. It is called on page unload.
        purge: function(d) {
          var a = d.attributes, i;
          if (a) {
            for (i = 0; i < a.length; i += 1) {
              if (typeof d[a[i].name] === 'function') d[a[i].name] = null;
            }
          }
          a = d.childNodes;
          if (a) {
            for (i = 0; i < a.length; i += 1) purge(d.childNodes[i]);
          }
        },
  
        // **DOMready function**
        // As seen here: <https://github.com/dperini/ContentLoaded/>.
        ready: (function() { return function(fn) {
          var win = window, done = false, top = true,
          doc = win.document, root = doc.documentElement,
          add = doc.addEventListener ? 'addEventListener' : 'attachEvent',
          rem = doc.addEventListener ? 'removeEventListener' : 'detachEvent',
          pre = doc.addEventListener ? '' : 'on',
          init = function(e) {
            if (e.type == 'readystatechange' && doc.readyState != 'complete') return;
            (e.type == 'load' ? win : doc)[rem](pre + e.type, init, false);
            if (!done && (done = true)) fn.call(win, e.type || e);
          },
          poll = function() {
            try { root.doScroll('left'); } catch(e) { setTimeout(poll, 50); return; }
            init('poll');
          };
          if (doc.readyState == 'complete') fn.call(win, 'lazy');
          else {
            if (doc.createEventObject && root.doScroll) {
              try { top = !win.frameElement; } catch(e) { }
              if (top) poll();
            }
            doc[add](pre + 'DOMContentLoaded', init, false);
            doc[add](pre + 'readystatechange', init, false);
            win[add](pre + 'load', init, false);
          }
        }
        })()
  
      }
    }
  
    // ## The audiojs class
    // We create one of these per `<audio>` and then push them into `audiojs['instances']`.
    container[audiojsInstance] = function(element, settings) {
      // Each audio instance returns an object which contains an API back into the `<audio>` element.
      this.element = element;
      this.wrapper = element.parentNode;
      this.source = element.getElementsByTagName('source')[0] || element;
      // First check the `<audio>` element directly for a src and if one is not found, look for a `<source>` element.
      this.mp3 = (function(element) {
        var source = element.getElementsByTagName('source')[0];
        return element.getAttribute('src') || (source ? source.getAttribute('src') : null);
      })(element);
      this.settings = settings;
      this.loadStartedCalled = false;
      this.loadedPercent = 0;
      this.duration = 1;
      this.playing = false;
    }
  
    container[audiojsInstance].prototype = {
      // API access events:
      // Each of these do what they need do and then call the matching methods defined in the settings object.
      updatePlayhead: function() {
        var percent = this.element.currentTime / this.duration;
        this.settings.updatePlayhead.apply(this, [percent]);
      },
      skipTo: function(percent) {
        if (percent > this.loadedPercent) return;
        this.element.currentTime = this.duration * percent;
        this.updatePlayhead();
      },
      load: function(mp3) {
        this.loadStartedCalled = false;
        this.source.setAttribute('src', mp3);
        // The now outdated `load()` method is required for Safari 4
        this.element.load();
        this.mp3 = mp3;
        container[audiojs].events.trackLoadProgress(this);
      },
      loadError: function() {
        this.settings.loadError.apply(this);
      },
      init: function() {
        this.settings.init.apply(this);
      },
      loadStarted: function() {
        // Wait until `element.duration` exists before setting up the audio player.
        if (!this.element.duration) return false;
  
        this.duration = this.element.duration;
        this.updatePlayhead();
        this.settings.loadStarted.apply(this);
      },
      loadProgress: function() {
        if (this.element.buffered != null && this.element.buffered.length) {
          // Ensure `loadStarted()` is only called once.
          if (!this.loadStartedCalled) {
            this.loadStartedCalled = this.loadStarted();
          }
          var durationLoaded = this.element.buffered.end(this.element.buffered.length - 1);
          this.loadedPercent = durationLoaded / this.duration;
  
          this.settings.loadProgress.apply(this, [this.loadedPercent]);
        }
      },
      playPause: function() {
        if (this.playing) this.pause();
        else this.play();
      },
      play: function() {
        var ios = (/(ipod|iphone|ipad)/i).test(navigator.userAgent);
        // On iOS this interaction will trigger loading the mp3, so run `init()`.
        if (ios && this.element.readyState == 0) this.init.apply(this);
        // If the audio hasn't started preloading, then start it now.
        // Then set `preload` to `true`, so that any tracks loaded in subsequently are loaded straight away.
        if (!this.settings.preload) {
          this.settings.preload = true;
          this.element.setAttribute('preload', 'auto');
          container[audiojs].events.trackLoadProgress(this);
        }
        this.playing = true;
        this.element.play();
        this.settings.play.apply(this);
      },
      pause: function() {
        this.playing = false;
        this.element.pause();
        this.settings.pause.apply(this);
      },
      setVolume: function(v) {
        this.element.volume = v;
      },
      trackEnded: function(e) {
        this.skipTo.apply(this, [0]);
        if (!this.settings.loop) this.pause.apply(this);
        this.settings.trackEnded.apply(this);
      }
    }
  
    // **getElementsByClassName**
    // Having to rely on `getElementsByTagName` is pretty inflexible internally, so a modified version of Dustin Diaz's `getElementsByClassName` has been included.
    // This version cleans things up and prefers the native DOM method if it's available.
    var getByClass = function(searchClass, node) {
      var matches = [];
      node = node || document;
  
      if (node.getElementsByClassName) {
        matches = node.getElementsByClassName(searchClass);
      } else {
        var i, l,
            els = node.getElementsByTagName("*"),
            pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
  
        for (i = 0, l = els.length; i < l; i++) {
          if (pattern.test(els[i].className)) {
            matches.push(els[i]);
          }
        }
      }
      return matches.length > 1 ? matches : matches[0];
    };
  // The global variable names are passed in here and can be changed if they conflict with anything else.
  })('audiojs', 'audiojsInstance', this);