if (document.all) var IE = true; else var IE = false;

function show_menu(menu_id)
{
	var menu = document.getElementById(menu_id);
	menu.style.display = 'block';
}

function hide_menu(menu_id)
{
	var menu = document.getElementById(menu_id);
	menu.style.display = 'none';
}

function show_article(id)
{
	var string = 'plie';
	var i;
	var idChamp;

	var elem = document.getElementById(id);
	var prevstyle = elem.style.display;

	for (i=1; i<20; i++)
	{
		idChamp = string+i;
		elem = document.getElementById(idChamp);
		if (elem) elem.style.display = 'none';
	}
	
	elem = document.getElementById(id);
	
	if (prevstyle == 'none') elem.style.display = 'block';
}