window.onload=affiche;

function affiche(id) {

	var d = document.getElementById(id);
	for (var i = 1; i<=1; i++) {
		if (document.getElementById('nav'+i)) {
			document.getElementById('nav'+i).style.display='none';
			document.getElementById('submenu').style.display = 'block';
			document.getElementById('itemsubmenu').style.background='url(http://www.7xmed.com/style/item4.gif) top left no-repeat';
		}
	}
	if (d) {
		d.style.display='block';
		document.getElementById('itemsubmenu').style.background='url(http://www.7xmed.com/style/item4.gif) 0 -18px no-repeat';
	}
}