I was wondering how to get my main content at the top of my html document when the Navigation goes across under the header. Here is how my main layout looks:
<div id="wrapper">
<div id="header>
</div>
<div id="nav">
</div>
<div id="content">
</div>
<div id="footer>
</div>
</div>

Thanks
If this is discussed somewhere a link would be great because I did not find it.