code: function(value) {
              if (!this.browser.webkit) {
                  var el = this._getSelectedElement();
                  if (el && this._isElement(el, 'span') && this._hasSelection()) {
                      if (el.style.fontWeight == 'bold') {
                          el.style.fontWeight = '';
                          var b = this._getDoc().createElement('b'),
                          par = el.parentNode;
                          par.replaceChild(b, el);
                          b.appendChild(el);
                      }
                  }
              }
              return [true];
          }
docs: /* {{{  Command Overrides 
  @method cmd_bold
  @param value Value passed from the execCommand method
  @description This is an execCommand override method. It is called from execCommand when the execCommand('bold') is used.