一个简单的AJAX

function change(N1, N2) {

    $.ajax({
        url: "" + host + "/chang",
        data: {    version: Version,
            N1: UserId,
            N2: Phone,
           n3:name
        },
        type: "post",
        dataType: "json",
        success: function (data) {
            if(data){
                //.........
            }
        }

    })
}

/*获取url地址中指定参数的值*/
     function getQueryString(name) {
     var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");
     var r = window.location.search.substr(1).match(reg);
     if (r != null) return unescape(r[2]); return null;
     }
     var n3=getQueryString("n3");  //会员ID