1 //发送一个ajax请求，嵌套的ajax请求 2 ‘ajaxCall‘: function(url1, data1, url2, data2){ 3     var returnValue = http://www.mamicode.com/‘‘; 4     $.ajax({ 5         type: "POST", 6         url: url1, 7         async: false, 8         data: data1, 9         success: function(data3) {10             //TODO11             //外层ajax响应成功，就再次发送ajax请求到第二个地址12             $.ajax({13                 type: "POST",14                 url: url2,15                 data: data2,16                 async: false,17                 success: function(data4) {18                     //TODO19                 }20             });21         }22     });23     return returnValue;24 }