exxt demo

function GetInvoices(record, expander, callback) {
    Ext.Ajax.request( {
     url : 'getDetailInvoices.json',
     params : {
      'chkNo' : record.data.chkNo,
      'vendorNo' : record.data.vendNo
     },
     success : function(response) {
      var data = Ext.decode(response.responseText);
      if (!data.success) {
       showError(data.message, checkBooks);
       return true;
      }
      // 设置模板中所需要的record数据，并展开该行
     record.data.checkSignerInvoicess = data.records;
     record.commit();

     if (callback) {
      callback(expander);// 一定要回调该函数，否则不能展开
    }
   },
   failure : function() {
    if (callback) {
     callback(expander);
    }
   }
    })
   }
   ;