(function ($) {
    $.modal = {}
    $.modal.show = function (message) {

        $.fn.push = function (html) {
            return this.append(html).children(":last");
        };

        var DIALOG_WIDTH = 400;
        var DIALOG_HEIGHT = 300;
        var CUSHION_LENGTH = 20000;
        FADE_DURATION = 400;
        var mask = $("<div/>")
                .animate({opacity: 0.85}, FADE_DURATION)
                .css({
                    position: "absolute",
                    top: -CUSHION_LENGTH,
                    left: -CUSHION_LENGTH,
                    background: "#999",
                    zIndex: 999998,
                    height: 2 * CUSHION_LENGTH + $(window).height(),
                    width: 2 * CUSHION_LENGTH + $(window).width(),
                    opacity: 0.01
                })
                .click(function (ev) {
                    close(ev);
                })
                .appendTo($(document.body));

        var dialog = $("<div/>")
                .fadeIn(FADE_DURATION)
                .css({
                    position: "absolute",
                    background: "#fff",
                    border: "1px solid #666",
                    width: DIALOG_WIDTH,
                    height: DIALOG_HEIGHT,
                    zIndex: 999999,
                    top: $(window.body).scrollTop() + $(window).height() / 2 - DIALOG_HEIGHT / 2,
                    left: $(window).width() / 2 - DIALOG_WIDTH / 2
                })
                .push("<div/>")
                .css({
                    margin: "10px"
                })
                .html(message)
                .end()
                .push("<div/>")
                .css({
                    position: "absolute",
                    top: "-1.2em",
                    right: "4px",
                    cursor: "pointer"
                })
                .html("X")
                .click(function (ev) {
                    close(ev);
                })
                .end()
                .appendTo($(document.body));

        $(window.body).keyup(function (ev) {
            if (ev.charCode == 27 || ev.keyCode == 27)
                close(ev);
        });

        function close(ev) {
            ev.stopPropagation();
            dialog.slideUp(FADE_DURATION, function () {
                dialog.remove();
            });
            mask.fadeOut(FADE_DURATION, function () {
                mask.remove();
            });
        }

    }
})(jQuery);