joshuagullphotographys on "editing the header"

How would I add my own html header/navigation:

<link rel="SHORTCUT ICON" href="http://www.joshuagullphotography.com/photos/928320924_qjXgy-Ti.png">
<div id="secret">
.
</div>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.js" type="text/javascript"></script>
<div id="banner">
<div id="logo">
</div>
<div id="navigation">
<ul id="jsddm">

<div style="clear: both;"></div>
</div>
</div>

Where do I put this...I see where to add the css rules, but can't find where to add html