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=this.className.replace(new RegExp(" sfhover\\b"), "");		
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);

function On(id,img){document.getElementById(id).src = img; }
function Off(id,img) {document.getElementById(id).src = img; }

function Erase(what)
{
	if(what.value == "Votre adresse email" || what.value == "Your email"){what.value = "";}
}