I've noticed that when I am trying to check for a variable within the window object, javascript will return the DOM node of an id matching the variable name. Consider the following code:

```
<html>
<body>
  <div id='hello'>
  </div>
  <script>console.log(window.hello);</script>
</body>
</html>

```

In this example, the console will output the DOM object representation of `<div id='hello'>` and any of its descendants. I've also observed that overwriting window.hello doesn't affect the DOM and subsequent operations show the new assignment. 

Is there a way to type check specifically for a DOM object? Alternatively, is there a way to avoid this behavior? Although not difficult, having to be conscious of page ID's when choosing namespaces seems like it could become very counter intuitive.