Javascript to make background image clickable?

Question

I can't use a div because the CMS I am using won't allow html into the theme style (it's using a weird structure in its coding) and the only thing that I found that has worked is javascript but I don't know what javascript code will enable a clickable background image.

Any ideas?

<meta name="description" content="description here"> 
<script type="text/javascript"> 
    document.backgroundImage = "url('http://mydomain.com/image.jpg')";
    function callback() { 
        location.href = "http://mylink.com";
    } 
    document.addEventListener("click", callback, false);
</script> 
<script type="text/javascript"> //google analytics code </script>

Answer 1

this is the background of something right? This something has to receive the click event handler.

cheers.

edit: adding example:

Hypothesis:

o.id = "OhMyCuteness";
o.style.backgroundImage = "url('...')";

then:

o.addEventListener("click", callback, false);

and:

function callback(clickEvent) {
    alert("They clicked meeeee buhuhuhu: " + clickEvent.target.id);
}

Edit2: in the case your document has a background this is exactly the same, use the document instead of the element "o" as a target for addEventListener.