code: function (value) {
  			var anim = this.get(ANIM),
  				pixelValue = Math.floor((value - this.get(MIN_VALUE)) * this._barFactor),
  				barEl = this.get(BAR_EL);
  			
  			this._setAriaText(value);
  			if (this._rendered) {
  				if (anim) {
  					anim.stop();
  					if (anim.isAnimated()) { anim._onComplete.fire(); } // see: http://yuilibrary.com/projects/yui2/ticket/2528217
  				}
  				this.fireEvent(START,this._previousValue);
  				this._barSizeFunction(value, pixelValue, barEl, anim);
  			}
  		}
docs: Called in response to a change in the <a href="#config_value">value</a> attribute.
  Moves the bar to reflect the new value
  @method _valueChange
  @return  void
  @private