This is the code in my html file: 

<script type="text/javascript" src="js/jquery-2.1.3.min"></script>

<script type="text/javascript" src="js/index.js"></script>

 I'm not having any trouble with the js/index.js file.

I found some information that said I needed to check my registry .js Content Type to make sure its data type was not "text/plain," and if it was to change it to "text/javascript" or delete the Content Type entirely. My data type was "application/javascript," so I changed it to text/javascript to see if that would help. It didn't, so I changed it back. I'm using Windows 8.1.

Any idea what I'm doing wrong?