function ouvre(menu){
	var sMenu = document.getElementById(menu);
	if(sMenu.style.display == "none"){
		sMenu.style.display = "block";
		document.getElementById("puceDeroul").src = "images/puceMenuDeroul2.gif";
	}else{
		sMenu.style.display = "none";
		document.getElementById("puceDeroul").src = "images/puceMenuDeroul.gif";
	}
}