$(function () {
    $.ajaxSetup({
        error: function (req, data, ex) {
            var $errorPopup = $('#errorPopup');
            if ($errorPopup.length == 0) {
                $errorPopup = $('<div id="#errorPopup" style="width:500px; height: 600px; overflow: auto;"/>').appendTo($('body'));
            }
            $errorPopup.html(req.responseText).showModal();
        }
    });
});