function showTab(num) {

    for (var i = 0; i < 6; i++) {

        if (num == i) {

            document.getElementById('t_' + i).className = 'off';

            document.getElementById('c_' + i).style.display = '';

        } else {

            document.getElementById('t_' + i).className = 'off1';

            document.getElementById('c_' + i).style.display = 'none';

        }
    }



    //
    var CityCode = "CTU";
    if (num == 0) {
        CityCode = "CTU";
    }
    else if (num == 1) {
        CityCode = "PEK";
    }
    else if (num == 2) {
        CityCode = "SHA";
    }
    else if (num == 3) {
        CityCode = "CAN";
    }
    else if (num == 4) {
        CityCode = "SZX";
    }
    else {
        CityCode = "XXX";
    }

    if ($("#c_" + num).html() == "") {
        $("#c_" + num).html("正在查询数据...");

        var Time = Date()
        $.get("GetRecommendTicketInfo.ashx?Date=" + Time,
                    { CityCode: CityCode },
                     function(TicketInro) {
                         $("#c_" + num).html(TicketInro);
                     });

        var temp = new srcMarquee("c_" + num, 0, 1, 570, 151, 30, 3000, 3000, 151)
        return false;

    }
}