Почему в параметре фун-и выводится undefined

function DateValid() {
$(".running").removeClass("running")
if (
    $(this).parent(".locomotive-wrap-traffic").parent(".flex").children(".locomotive-game-text").children(".locomotive-otvet-false").hasClass("active") ||
    $(this).parent(".locomotive-wrap-traffic").parent(".flex").children(".locomotive-game-text").children(".locomotive-true").hasClass("disabled")) {
    $(".locomotive-false").addClass("defeat")
    $(".locomotive-user").addClass("defeat")
    setTimeout(function () {
        TrueDATA = $(this).parent(".locomotive-wrap-traffic").parent(".flex").children(".locomotive-game-text").data("truetext")
        alert(TrueDATA);//Тут выводится ОК
        DefeatPage(TrueDATA)
        $(".running").addClass("running")
    },5000)
} else {
    $(".locomotive-user").addClass("active")
    setTimeout(function () {
        TrueDATA = $(this).parent(".locomotive-wrap-traffic").parent(".flex").children(".locomotive-game-text").data("truetext")
        WinPage()
        $(".running").addClass("running")
    },5000)
}
}
function DefeatPage(param) {
    alert(param);// тут undefined
    $(".locomotive-start").hide()
    $(".locomotive-result-win").hide()
    $(".locomotive-game-wrap").hide()
    $(".locomotive-game-wrap .flex").hide()
    $(".locomotive-rule").hide()
    $(".locomotive-game").show()
    $(".locomotive-result-lose").show()
    $(".locomotive-otvet-false").removeClass("active")
    $(".locomotive-true").removeClass("active")
    $(".locomotive-false").removeClass("defeat")
        $(".locomotive-user").removeClass("defeat")
    $("#reuslt-text").html(param)
    AppStatus = "defeat"
}