code: function initTabs() {
          var tabs = $G('tabhead').children;
          for (var i = 0; i < tabs.length; i++) {
              domUtils.on(tabs[i], "click", function (e) {
                  var target = e.target || e.srcElement;
                  setTabFocus(target.getAttribute('data-content-id'));
              });
          }
  
          setTabFocus('upload');
      }
docs: /* 初始化tab标签