jquery ajax 经典实例

$.ajax({
	url:"/yjxtj/index.php?m=app&a=purchase",
    async:true,//同步请求，默认情况下是异步（true）
    beforeSend:function(){
        $(".warning").show();
    },
    type: 'post',
    dataType: 'json',
    data: {
        uid: uid,
        packageid: "211005",
        num: num,
        totalprice: num*salePrice,
    },
    error:function(request) {
        alert("Connection error");
    },
	success:function(data){
		 var data =eval('('+data+')');

		
	}
});