You control design and styles using CSS, not the behavior of your content.
- <a id="header" href="[your link]">Logo</a>, CSS, :
a#header {
background-image: url(...);
display: block;
width: ..;
height: ...;
}
div <a> - "" . <a> , . , Javascript , - <a>.
<a> <div>, :)
, JavaScript, <div> :
Document.getElementById("header").onclick = function() {
window.location='...';
}