the alert callback bug

[l3917055]

when I use alert callback  like this
         $.messager.alert("提示", "保存成功", "info", function(){ $.messager.progress("close")});

when the callback is fired, will display such a error message "Uncaught TypeError: Cannot read property 'options' of undefined"

why? and  how to fix it

[l3917055]

$.ajax({
            url: $$.getRootPath() + currentPath + 'SetProxyUser',
            cache: false,
            type: "post",
            data: { userIds: userIds.join($$.splitor), goodsOwnerID: goodsOwnerID },
            beforeSend: function () { $.messager.progress("close"); },
            error: function () { $$.progressEnd(); },
            success: function (result) {
                if (result.Success) {
                    $.messager.alert("提示", "保存成功", "info", function(){ $.messager.progress("close");});
                }
                else {
                    $.messager.alert("提示", "保存失败" + result.Message, "info", function(){$.messager.progress("close");});
                }
            }
        });

[l3917055]

I'm using easyui 1.3.1

[l3917055]

this condition not awlays heppen.
only when I use  a dialog

$("#popupProxyUser").dialog({
                href: url,//this url is a other page which i find the alert callback bug
                title: "代理用户",
                width: 600,
                height: 500,
                modal: true,
                closed: false,
                cache: false
            });