Ingiborn,
<!DOCTYPE HTML>
<html>
<head>
<link rel="stylesheet" type="text/css" href="/css/style.css" onload="visibl_IMG()"/>->Внутри данного стиля
html {background:url(fon.jpg)} }
<style id="HideImg" type="text/css">
body img {
visibility:hidden;
}
</style>
<script type="text/javascript">
function visibl_IMG() {
document.getElementById('HideImg').innerHTML='';
}
</script>
</head>
<body>
<img src="image.jpg" />
</body>
</html>