function show(a)
{
	document.getElementById(a).style.display='block';
	document.getElementById(a).style.visibility='visible';
	
}
function hide(a)
{
	document.getElementById(a).style.display='none';
	document.getElementById(a).style.visibility='hidden';
}

function ouvrir(a)
{
	if(document.getElementById(a).style.display=="block")
		hide(a);
	else
		show(a)
}