           o Plays a multiframe resource starting at the specified framenumber
           o Plays from the current frame if framenumber is null 
       */
-      public function play( framenumber:*, rel=null ):void {
+      public function play( framenumber:Number = 1,  rel:Boolean = false ):void {
           // TODO [hqm 2008-04] what to do about playing movies? 
           stop(framenumber);
       }

          o Stops a multiframe resource at the specified framenumber
          o Stops at the current frame if framenumber is null 
      */
      public function stop( fn:*, rel:* = null ):void {
          // So frames are one based, not zero based? 
          this.frame = fn;
          var framenumber = fn - 1;
          if (this.resource == null) {
              return;
          }
          var resinfo = LzResourceLibrary[this.resource];
          var frames = resinfo.frames;
          var assetclass;

          // single frame resources get an entry in LzResourceLibrary which has
          // 'assetclass' pointing to the resource Class object.
          if (resinfo.assetclass is Class) {

              // Multiframe resources have an array of Class objects in frames[]
              assetclass = frames[framenumber];
          }

          if (! assetclass) return;
          if (this.resourceCache == null) {
              this.resourceCache = [];
          }
