如何用js监听上下滚动到随便某一个div时能获取到该div的id

Question

<nav>

    <ul>

        <li><a href="#About">About</a></li>

        <li><a href="#Skill">Skill</a></li>

        <li><a href="#Experience">Experience</a></li>

        <li><a href="#More">More</a></li>

        <li><a href="#Contact">Contact</a></li>

    </ul>

</nav>

<div id = "About">

</div>

<div id = "Skill">

</div>

<div id = "AExperience">

</div>

<div id = "More">

</div>

<div id = "Contact">

</div>