code: function() {
          var btn = Dom.getElementsByClassName(this.Style.CSS_LINK_CLOSE, "a", this.oDomContainer)[0] || null;
          if (btn) {
              Event.purgeElement(btn);
              this.oDomContainer.removeChild(btn);
          }
      }
docs: Removes the close button HTML element from the DOM
  
  @method removeCloseButton