code: function (element, which) {
                  var cs = element.currentStyle;
                  var propName = "padding" + which;
                  return this.convertToPixels(cs[propName], element, propName);
              }
docs: Helper function needed for IE to calculate padding in pixels, since <code>element.currentStyle</code>
  may return non-pixel value.
  @param {HTMLElement} element The DOM element on which to retrieve a CSS property
  @param {String} which either "Left", "Right", "Top" or "Bottom" (case is important)
  @return {Number} padding in pixels