code: function(el, html, returnElement) {
          var newNode;
  
          el = Ext.getDom(el);
          html = this.markup(html);
  
          // IE Inserting HTML into a table/tbody/tr requires extra processing: http://www.ericvasilik.com/2006/07/code-karma.html
          if (Ext.isIE && this.tableRe.test(el.tagName)) {
              // Clearing table elements requires removal of all elements.
              while (el.firstChild) {
                  el.removeChild(el.firstChild);
              }
              if (html) {
                  newNode = this.insertHtml('afterbegin', el, html);
                  return returnElement ? Ext.get(newNode) : newNode;
              }
              return null;
          }
          el.innerHTML = html;
          return returnElement ? Ext.get(el.firstChild) : el.firstChild;
      }
docs: Creates new DOM element(s) and overwrites the contents of el with them.
  @param {String/HTMLElement/Ext.Element} el The context element
  @param {Object/String} o The DOM object spec (and children) or raw HTML blob
  @param {Boolean} [returnElement] true to return an Ext.Element
  @return {HTMLElement/Ext.Element} The new node