设置默认Ajax操作cache and error

    // 设置Ajax操作的默认设置

    $.ajaxSetup({

        cache: false, 

        error: function (XMLHttpRequest, textStatus, errorThrown) {

            if( typeof(errorThrown) != "undefined" )

                $.messager.alert(g_MsgBoxTitle, "调用服务器失败。<br />" + errorThrown ,'error');

            else{

                var error = "<b style='color: #f00'>" + XMLHttpRequest.status + "  " + XMLHttpRequest.statusText + "</b>";

                var start = XMLHttpRequest.responseText.indexOf("<title>");

                var end = XMLHttpRequest.responseText.indexOf("</title>");

                if( start > 0 && end > start )

                    error += "<br /><br />" + XMLHttpRequest.responseText.substring(start + 7, end);

                    $.messager.alert(g_MsgBoxTitle, "调用服务器失败。<br />" + error ,'error');

            }

        }

    });