function affiche() {
	span=document.getElementById("ArriveeDepart");
	span.style.visibility="visible";
}
function cache() {
	span=document.getElementById("ArriveeDepart");
	span.style.visibility="hidden";
	span.height = 0;
}
function affiche2() {
	span=document.getElementById("Invite");
	span.style.visibility="visible";
}
function cache2() {
	span=document.getElementById("Invite");
	span.style.visibility="hidden";
	span.height = 0;
}