function voir() {
	var i, obj, args = voir.arguments;

	if(document.getElementById) {
		for (i=0; i<args.length; i++) {
			obj = document.getElementById(args[i]);
	 		obj.style.display = "block";
	 		obj.style.visibility = "visible";
	 	}
	}
}

function cache() {
	var i, obj, args = cache.arguments;

	if(document.getElementById) {
		for (i=0; i<args.length; i++) {
			obj = document.getElementById(args[i]);
	 		obj.style.display = "none";
	 		obj.style.visibility = "hidden";
	 	}
	}
}