code: function() {
          var cssClose = YAHOO.widget.CalendarGroup.CSS_2UPCLOSE,
              cssLinkClose = this.Style.CSS_LINK_CLOSE,
              DEPR_CLOSE_PATH = "us/my/bn/x_d.gif",
              
              lnk = Dom.getElementsByClassName(cssLinkClose, "a", this.oDomContainer)[0],
              strings = this.cfg.getProperty(DEF_CFG.STRINGS.key),
              closeStr = (strings && strings.close) ? strings.close : "";
  
          if (!lnk) {
              lnk = document.createElement("a");
              Event.addListener(lnk, "click", function(e, cal) {
                  cal.hide(); 
                  Event.preventDefault(e);
              }, this);
          }
  
          lnk.href = "#";
          lnk.className = cssLinkClose;
  
          if (Calendar.IMG_ROOT !== null) {
              var img = Dom.getElementsByClassName(cssClose, "img", lnk)[0] || document.createElement("img");
              img.src = Calendar.IMG_ROOT + DEPR_CLOSE_PATH;
              img.className = cssClose;
              lnk.appendChild(img);
          } else {
              lnk.innerHTML = '<span class="' + cssClose + ' ' + this.Style.CSS_CLOSE + '">' + closeStr + '</span>';
          }
          this.oDomContainer.appendChild(lnk);
  
          return lnk;
      }
docs: Creates the close button HTML element and adds it to Calendar container DIV
  
  @method createCloseButton
  @return The close HTML element created