you should take a look to replacing H1 with images or logo.
http://css-tricks.com/css-image-replacement/
<h1 class=”technique-two”>
Your sitename
</h1>
CSS:
h1.technique-two {
width: 2350px; height: 75px;
background: url(“images/header-image.jpg”) top right;
margin: 0 0 0 -2000px;
}
