$(document).ready(function() {
    cao.on_socket_open = function() {
        $('#btn_join').show();
    };

    cao.on_join_game_ok = function() {
        $('#btn_join').hide();
        $('#btn_pick_black').show();
    };

    cao.on_show_white_card = function(idx, desc) {
        /* to change */
        element = $('.card_desc').eq(idx);
        element.html(desc);
        element.dblclick(this.gen_callback_white_card(i));
    };

    cao.on_pick_black_card_ok = function() {
        $('#btn_collect').show();
        $('#btn_pick_black').hide();
    };

    cao.on_show_black_card = function(desc) {
        $('#black_card').show();
        $('#black_card').html(desc);
    };

    cao.on_played_white_card_ok = function(idx) {
        element = $('.card_desc').eq(idx);
        element.empty();
        element.dblclick(null);
    };

    cao.on_collect_cards_ok = function() {
        $('#btn_collect').hide();
    };

    cao.run();
});