<html>
<body id="a-b-c">
<div id="something"></div>
something has type <script>document.write(typeof something)</script><br>
window["a-b-c"] has type <script>document.write(typeof window["a-b-c"])</script><br>
window.hasOwnProperty("something") is <script>document.write(window.hasOwnProperty("something"))</script><br>
something === document.getElementById("something") is <script>document.write(something === document.getElementById("something"))</script><br>
</body>
</html>