sfHover_haut = function() {
	var sfEls_haut = document.getElementById("nav_haut").getElementsByTagName("LI");
	for (var i=0; i<sfEls_haut.length; i++) {
		sfEls_haut[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls_haut[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
sfHover_bas = function() {
	var sfEls_bas = document.getElementById("nav_bas").getElementsByTagName("LI");
	for (var i=0; i<sfEls_bas.length; i++) {
		sfEls_bas[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls_bas[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover_haut);
if (window.attachEvent) window.attachEvent("onload", sfHover_bas);