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;          }     }});