text: apiready = function(){
      api.setRefreshHeaderInfo({
          visible: true,
          loadingImg: 'widget://image/refresh-white.png',
          bgColor: '#ccc',
          textColor: '#fff',
          textDown: '下拉试试...',
          textUp: '松开试试...',
          showTime: true
      }, function(ret, err){
          setTimeout(function(){
              api.refreshHeaderLoadDone();
              var content = $api.byId('content');
              var str = '<h4>数据加载完毕！！</h4><p>在此可刷新页面。</p>';
              content.innerHTML = str;
              api.parseTapmode();
          }, 2000);
      });
      show = function(){
          api.alert({msg:'试试反应速度如何'});
      };
  }