// 添加以下代码来进行测试：

 // ajax 发生错误，就会执行

$('body').ajaxError(function(e, xhr, setting, text){

    // e - event 事件

    // xhr - XMLHttpRequest 对象

    // setting - ajax 设置

    // text - 错误信息

    alert(text);

});

 

// ajax 完成后，就会执行

$('body').ajaxComplete(function(){

    alert('complete'); // ajax 请求完成就会执行

})

//同步请求，锁住浏览器

 $.ajax({

        url: '/sms/AjaxSMS.ashx',

        type: "POST",

        data: "txtcontent=" + content+"&txtback=" + content2+"",

        async: false, 

        dataType:"json",

        success: function(data) {

            if (data == "成功" || data == "[object XMLDocument]") {

                IsAddSuffix(hdtatolSMS, arr, mob); //后缀名

                confirm("您本次发送短信数量为：" + (parseInt(hdtatolSMS) * arr.length) + ",确认发送吗？");

            } else {

                alert(content + "可能涉及广告类、营销类等系统不允许发送的内容，请修改后再发送。");

            }

        },

        error: function(a) {

            alert(a.responseText);

        }

    });

//添加后缀判断

function IsAddSuffix(data, arr, mob) {

    var txtBack = document.getElementById("ctl00_ContentPlaceHolder1_txtBack").value;

    if (txtBack == "") {

        confirm("后缀为空，您本次发送短信数量为：" + (parseInt(data) * arr.length) + ",确认发送吗？");

    } else {

        if (txtBack.length + mob.value.length > maxnums - 1) {

            alert("内容加上后缀(系统自动补充空格)长度不能起过" + maxnums + "个字符，请重新输入!");

        }

    }

}

 

 

 <script type="text/javascript" language="javascript">

        $(function() {

            //弹出提示框（快旅新域名）

            var isRead = getHCookie('warnTips');

            if (isRead == null) {

                popupDiv('pop-div');

            }

            function popupDiv(div_id) {

                var div_obj = $("#" + div_id);

                var windowWidth = document.documentElement.clientWidth;

                var windowHeight = document.documentElement.clientHeight;

                var popupHeight = div_obj.height();

                var popupWidth = div_obj.width();

                //添加并显示遮罩层  

                $("<div id='mask'></div>").addClass("mask")

                .width(windowWidth * 0.99)

                .height(windowHeight * 0.99)

                //.css({ "position": "absolute", "background": "#CCCCCC", "left": "0px", "top": "0px", "zIndex": "1", "filter": "Alpha(Opacity=60)" })遮盖层

                .css({ "position": "absolute" })

                .click(function() { hideDiv(div_id); })

                .appendTo("body")

                .fadeIn(200);

                div_obj.css({ "position": "absolute" })

                .animate({ left: windowWidth / 2 - popupWidth / 2,

                    top: windowHeight / 2 - popupHeight / 2, opacity: "show"

                }, "slow");

            }

        });

        function hideDiv(div_id) {

            $("#mask").remove();

            $("#" + div_id).animate({ left: 0, top: 0, opacity: "hide" }, "slow");

            //记录cookie

            SetHCookie('warnTips', 'read');

            //window.parent.del();

        }

        function SetHCookie(name, value)//两个参数，一个是cookie的名称，一个是值

        {

            var Days = 1; //此 cookie 将被保存 1 天 

            var exp = new Date();

            exp.setTime(exp.getTime() + Days * 24 * 60 * 60 * 1000);

            document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString();

        }

        function getHCookie(name)//取cookies函数         

        {

            var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));

            if (arr != null) return unescape(arr[2]); return null;

        }

        function delHCookie(name)//删除cookie 

        {

            var exp = new Date();

            exp.setTime(exp.getTime() - 1);

            var cval = getHCookie(name);

            if (cval != null) document.cookie = name + "=" + cval + ";expires=" + exp.toGMTString();

        }

  </script>

z-index遮罩层的光标输入方案：遮罩层问题。必须设置z-index，必须小于父div元素的数值，不然会失去效果。