function showMenu(id)
{
	displayMenu(id,'block');
}

function hideMenu(id)
{
	displayMenu(id,'none');
}

function displayMenu(id,value)
{
	balise = document.getElementById(id)
	
	if(!balise) return false;
	
	balise.style.display = value;
}

function changeClass(id,name)
{
	balise = document.getElementById(id)
	
	if(!balise) return false;
	
	balise.className = name;
}