code: function (sBGElId, sHandleElId, iUp, iDown, iTickSize) {
              return new Slider(sBGElId, sBGElId, 
                  new YAHOO.widget.SliderThumb(sHandleElId, sBGElId, 0, 0, 
                                     iUp, iDown, iTickSize), "vert");
      }
docs: Factory method for creating a vertical slider
  @method YAHOO.widget.Slider.getVertSlider
  @static
  @param {String} sBGElId the id of the slider's background element
  @param {String} sHandleElId the id of the thumb element
  @param {int} iUp the number of pixels the element can move up
  @param {int} iDown the number of pixels the element can move down
  @param {int} iTickSize optional parameter for specifying that the element
  should move a certain number pixels at a time.
  @return {Slider} a vertical slider control