Links on Page don't work on localhost

F5 works, but when page displays, the linked files don't seem to load.

e.g. images and javascript. here is the code I use:

<link rel="stylesheet" type="text/css" href="/Includes/CSS/NNGeneral.css" />
<script type="text/javascript" src="/Includes/JavaScript/Common.js"></script>

or

<img src="/Images/PageHeader.png" alt="Nauset Newcomers Home Page" />

The paths are correct as they work on web host, but not locally.