code: function ( progress ) {
              if ( progress < 0 ) {
                  progress = 0;
              } else if ( progress > 1 ) {
                  progress = 1;
              }
      
              this._seekCom = true;
              this._setSeekValue( progress );
              //this._clearDelay();
      
              if ( this._delayTime > 0 ) {
                  this._startDelay( this._to, this._delayTime );
              } else {
                  this._to();
              }
              return this;
          }
docs: 해당탐색 구간으로 즉시 이동
  @param	{Number}	progress 0~1
  @return	this