function cacher() {
	document.getElementById("deroulant_1").style.display = "none";
	document.getElementById("deroulant_2").style.display = "none";
	document.getElementById("deroulant_3").style.display = "none";
	document.getElementById("deroulant_4").style.display = "none";
	document.getElementById("deroulant_5").style.display = "none";
}

function montrer(numero) {
	document.getElementById("deroulant_" + numero).style.display = "block";
}

document.onclick = cacher;