147 IriSP.PopcornReplacement.player.prototype.volume = function(val) {

   148     if (typeof this.playerFns.getVolume == "undefined" || typeof this.playerFns.setVolume == "undefined") {

   149         return false;

   150     }

   151     var _vol = this.playerFns.getVolume();

   152     if (typeof(val) !== "undefined" && parseFloat(val) !== NaN) {

   153         val = Math.max(0, Math.min(1, val));

   154         if (parseFloat(val) != parseFloat(_vol)) {

   155             this.playerFns.setVolume(val);

   156             this.trigger("volumechange");

   157             _vol = this.playerFns.getVolume();

   158         }

   159     }

   160     return _vol;

   161 };

   162