//ajax
function AjaxRequest(requestURL) {
    //请求的URL
    var url = requestURL;
    /**
    请求参数字符串
    */
    var queryString = "";
    /*
    (默认: true) 默认设置下，所有请求均为异步请求;如果需要发送同步请求，请将此选项设置为 false
    */
    var async = true;
    /*
    设置浏览器缓存
    */
    var cache = false;
    /*
    请求方式
    */
    var type = "get";
    /*
    服务器返回的类型
    */
    var dataType = "json";
    /*
    发送请求前可修改 XMLHttpRequest 对象的函数
    */
    var beforeSend = null;
    /*
    (默认: 自动判断 (xml 或 html)) 请求失败时调用函数
    */
    var error = null;
    /*
    请求成功后回调函数。参数：服务器返回数据，数据格式
    */
    var success = null;
    /*
    请求完成后回调函数 (请求成功或失败时均调用)
    */
    var complete = null;

    /**
    *************************************************
    */

    this.setQueryString = function (qs) {
        queryString = qs;
    }

    this.getQueryString = function () {
        return queryString;
    }

    this.setUsePOST = function () {
        type = "POST";
    }
    this.setUseGET = function () {
        type = "GET";
    }
    this.setAsync = function (asyncBoolean) {
        async = asyncBoolean;
    }
    this.setBeforeSend = function (func) {
        beforeSend = func;
    }
    this.setError = function (func) {
        error = func;
    }
    this.setSuccess = function (func) {
        success = func;
    }
    this.setComplete = function (func) {
        complete = func;
    }
    /**
    send a Ajax Request 
    */
    this.sendRequest = function () {

        var bl = (url.indexOf("?") == -1 ? false : true);
        $.ajax({
            type: type,
            url: url + (bl ? "&" : "?") + "ts=" + Math.round(Math.random() * 100),
            data: queryString,
            dataType: dataType,
            beforeSend: beforeSend,
            //contentType: "application/json",
            error: error,
            success: success,
            complete: complete
        });
    }
}
/*
pUrl-访问URL
pSuccess-成功后运行函数
pError-失败后运行函数
showPg-是否显示加载
msg-加载提示
type-同步还是异步
*/
function getPermissionAjax(pUrl, pSuccess, pError, showPg, msg, type) {
    if (showPg) { progressShow(msg); }
    var errorFunc = null;
    var successFunc = null;
    errorFunc = function (data, status, error) {
        if (showPg) progressHide();
        alert("服务器返回错误!");
    };
    successFunc = function (data) {
        if (data == null) return;
        //显示进度
        if (showPg) progressHide();
        switch (data.type) {
            case "login":
                {
                    loginIn();
                    break;
                }
            case "success":
                {
                    pSuccess(data.result);
                    break;
                }
            case "error":
                {
                    if (!pError || pError == null) {
                        alert(data.result);
                    } else {
                        pError(data.result);
                    }
                    break;
                }
            default:
                {
                    alert(data.result);
                    break;
                }
        }
    };
    var ajax = new AjaxRequest(pUrl);
    if (type != "sync") ajax.setAsync(false);
    ajax.setError(errorFunc);
    ajax.setSuccess(successFunc);
    ajax.sendRequest();
}
function getJsonAjaxSync(pUrl, pSuccess, pError, showPg, msg) {
    getPermissionAjax(pUrl, pSuccess, pError, showPg, msg, "sync");
}
function getJsonAjax(pUrl, pSuccess, pError, showPg, msg) {
    getPermissionAjax(pUrl, pSuccess, pError, showPg, msg, "");
}

function postPermissionAjax(pUrl, pParm, pSuccess, pError, showPg, msg) {
    if (showPg) progressShow(msg);
    var ajax = new AjaxRequest(pUrl);
    var errorFunc = null;
    var successFunc = null;
    if (!pError) {
        errorFunc = function (data) {
            if (showPg) progressHide();
            alert("服务器返回错误!");
        }
        successFunc = function (data) {
            if (showPg) progressHide();
            switch (data.type) {
                case "login":
                    {
                        loginIn();
                        break;
                    }
                case "success":
                    {
                        pSuccess(data.result);
                        break;
                    }
                default:
                    {
                        alert(data.result);
                        break;
                    }
            }
        }
    } else {
        errorFunc = pError;
        successFunc = pSuccess;
    }
    ajax.setUsePOST();
    ajax.setError(errorFunc);
    ajax.setSuccess(successFunc);
    ajax.setQueryString(pParm);
    ajax.sendRequest();
}