function montre(id) {
   if (id == "partir_deux" || id == "sejour"){
   	if (document.getElementById("destination") != undefined){
      	document.getElementById("destination").style.visibility = "hidden";
      	document.getElementById("villedep").style.visibility = "hidden";
      }
   }
}

function cache(id) {
   
   if (id == "partir_deux" || id == "sejour"){
   	if (document.getElementById("destination") != undefined){
	      document.getElementById("destination").style.visibility = "";
	      document.getElementById("villedep").style.visibility = "";
	   }
   }
}