Jquery干扰了活动导航的滚动

我有以下Jquery：

//Change active class when scrolling
$(window).scroll(function() {
    var position = $(document).scrollTop();

    if (position <= home.top - 80) {
        $('.home-class').removeClass('active');
        $('.resume-class').removeClass('active');
        $('.contact-class').removeClass('active');
    }

    if (position >= home.top - 80) {
        $('.home-class').addClass('active');
        $('.resume-class').removeClass('active');
        $('.contact-class').removeClass('active');
    }

    if (position > resume.top - 50) {
        $('.home-class').removeClass('active');
        $('.resume-class').addClass('active');
        $('.contact-class').removeClass('active');
    }

    if (position > contact.top - 50) {
        $('.home-class').removeClass('active');
        $('.resume-class').removeClass('active');
        $('.contact-class').addClass('active');
    }
});

---

为什么背景色不会改变？无论发生什么情况，它都将保持默认的蓝色。这与Jquery有关吗？（一旦我取出Jquery，它就会正常工作。奇怪。）

也分享你的html代码。你在哪里设置默认的蓝色？请添加更多代码。我不会将其设置为任何颜色，@Alvaro。这是引导附带的默认蓝色。我正试图推翻它。

<nav class="navbar navbar-fixed-top">
    <div class="container">
        <ul class="nav nav-pills pull-right">
            <li class="home-class"><a href="#home-page" id="home">Home</a></li>     
            <li class="resume-class"><a href="#resume-page" id="resume">Resume</a></li>         
            <li class="contact-class"><a href="#contact-page" id="contact">Contact</a></li>
        </ul>
    </div>
</nav>

#home:hover, #resume:hover, #contact:hover,
#home:focus, #resume:focus, #contact:focus,
#home:active, #resume:active, #contact:active {
    background-color: #536872;
    color: #FFFFFF;
}

.active {
    background-color: #536872;
    color: #FFFFFF;
}