// menu déroulant !
 sfHover = function() {
	var sfEls = document.getElementById("nav").getElementsByTagName("li");
	for (var i=0; (i < sfEls.length); i++) {
		sfEls[i].onmouseover=function() {
			this.className="sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className="sfhout";
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);