// JavaScript Document
function cacher(reference){
	document.getElementById(reference).style.display="none";
}

function visible(reference){
	document.getElementById(reference).style.display="block";
}

function change_menu(reference){
	if (document.getElementById(reference).style.display == "none"){
	document.getElementById(reference).style.display = "block";
	}else{
	document.getElementById(reference).style.display = "none";
	}
}