ما سبب هذه المشكلة Uncaught ReferenceError: getNav is not defined

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$(function () {
$(".nav-rec")
    .each(function () {
        var a = $(this)
            , s = "/feeds/posts/summary/-/" + a.attr("data-label") + "?max-results=15&alt=json-in-script";
        a.append("<div class='nav-outer'><div class='toCenter'>" + loaderHTML + "<div class='nav-oi'></div></div></div>"), a.mouseenter(function () {
            $(this)
                .addClass("ready");
            var e = $(this);
            e.hasClass("loaded-c") || (e.addClass("loaded-c"), setTimeout(function () {
                getNav(s, a, ".nav-oi", 5), e.addClass("hide-load")
            }, 1e3))
        })
    }), $("li.nav-simple")
    .each(function () {
        var a = $(this);
        a.append("<div class='nav-outer'><div class='toCenter'>" + loaderHTML + "<div class='nav-simple-recent'></div></div></div>"), a.mouseenter(function () {
            var s = $(this);
            s.hasClass("loaded-c") || (s.addClass("loaded-c"), setTimeout(function () {
                get_simple_nav(a, "/feeds/posts/summary/?alt=json&max-results=15"), s.addClass("hide-load")
            }, 1e3))
        })
    }), $("li.nav-big")
    .each(function () {
        var a = $(this)
            , s = a.attr("data-label")
            , e = a.attr("data-heading")
            , t = void 0 === e ? s : e
            , i = "/feeds/posts/summary/-/" + s + "?max-results=7&alt=json-in-script";
        a.append('<div class="big-nav-outer"><div class="toCenter">' + loaderHTML + '<div class="nav-out-wrap"><div class="big-nav-inner"><div class="left-content"></div><div class="right-content"></div></div></div></div></div>'), a.mouseenter(function () {
            var e = $(this);
            e.hasClass("loaded-c") || (e.addClass("loaded-c"), setTimeout(function () {
                getBNav(a, s, t, i), e.addClass("hide-load")
            }, 1e3))
        })
    }), $(".megamenu")
    .each(function () {
        $(this)
            .append("<div class='megamenu-inner'><div class='toCenter'></div></div>"), $(this)
            .find("ul")
            .appendTo(".megamenu-inner .toCenter")
    })
});
var Default_Image_For_Recent_Posts = "";

function isScrolledIntoView(a) {
var s = $(a)
    , e = $(window)
    , t = e.scrollTop()
    , i = t + e.height()
    , d = s.offset()
    .top;
return d + s.height() <= i && d >= t
}