ajax中data传参的两种方式分析

/**
 * 订单取消
 * @return {Boolean} 处理是否成功
 */
function orderCancel(orderId, commant){
 var flag = false;
 $.ajax({
 type: "POST",
 url: "../order/orderCancel.action", //orderModifyStatus
 data: {"orderId":orderId,"commant":commant},
 dataType:"json",
 async:false,
 cache:false,
 success: function(data){
 var member = eval("("+data+")"); //包数据解析为json 格式
 if(member.success=="true"){
 flag = true;
 }else if(member.success=="false") {
 alert(member.info);
 }
 },
 error: function(json){
 alert("订单取消异常，请刷新后重试...");
 }
 });
 hidediv();
 return flag;
}