function isOver(id){
	var element = document.getElementById(id);
	element.className="choix over";
	for (var i=0; i < element.childNodes.length; i++){
		if(element.childNodes[i].nodeName == "A"){
			element.childNodes[i].style.color="#363636";
		}
	}
}
function isNotOver(id){
	var element = document.getElementById(id);
	element.className="choix notOver";
	for (var i=0; i < element.childNodes.length; i++){
		if(element.childNodes[i].nodeName == "A"){
			element.childNodes[i].style.color="#999999";
		}
	}
}
function showMenu(id){
	isOver(id);
	var element = document.getElementById(id);
	for (var i=0; i < element.childNodes.length; i++){
		if(element.childNodes[i].nodeName == "DIV"){
			element.childNodes[i].style.visibility="visible";
			element.childNodes[i].className="notOver";
		}
	}
}
function hideMenu(id){
	isNotOver(id);
	var element = document.getElementById(id);
	for (var i=0; i < element.childNodes.length; i++){
		if(element.childNodes[i].nodeName == "DIV"){
			element.childNodes[i].style.visibility="hidden";
			element.childNodes[i].className="notOver";
		}
	}
}