Images on index.php

Pardon the question for it’s seeming newbishness. I am trying to develop my own theme, built around an html design I’ve made.

Obviously images that are called in style.css show up. But any html coding that I have in index.php that includes the <img> tag, those images do not show.

What I want to do is create a menu/nav bar with images I have created myself. A different image for each link. Those images don’t seem to show.

Is using that tag in index.php not possible? Would it be better to create a single image of all the images/links and create an image map?

<div id="nav">
        <a href="http://blog.com/"><img src="images/home.png" width="75" height="15" border="0" /></a> |
	<a href="http://blog.com/"><img src="images/askvan.png" width="100" height="15" border="0" /></a> |
	<a href="http://blog.com/"><img src="images/about.png" width="113" height="15" border="0" /></a> |
	<a href="http://blog.com/"><img src="images/articles.png" width="300" height="15" border="0" /></a>
</div>

That’s the code I’ve put in index.php and the images do not show. So, this is wrong?

Any help would be appreciated.