ajax发送请求的方式

1

var param = {};
param.itemType = 2;
param.date = ticketObj.attr('showDate')+" "+ticketObj.attr('showTime')+":00";
param.itemId = ticketObj.attr('policyid');
param.couponId = certObj.couponid;
var flag = true;
$.ajax({
     type: 'POST',
     url: projectName+'/coupon/getCouponByParam.json',
     data: param,
     async:false,
     success: function(res){
        if(!res.enabled){
           if(res.msg){
              new_alert(res.msg, "error");                  
           }else{
              new_alert("该券不可使用", "error");
           }
           window.couponIstrue = false;
           flag = false;  
        }
     }
});