function checkall(id_base, nbr_box)
{
	for (i=1; i <= nbr_box; ++i)
	{
		if (document.getElementById(id_base).checked == true) //Il faut mettre true, car c'est lorsque l'on clique
		{
			document.getElementById(i).checked = true;
		}
		
		else
		{
			document.getElementById(i).checked = false;
		}
	}
}

function cache_div(id_div)
{
	if (document.getElementById(id_div).style.display == 'none')
	{
		document.getElementById(id_div).style.display = '';
	}
	
	else if (document.getElementById(id_div).style.display == '')
	{
		document.getElementById(id_div).style.display = 'none';
	}
}

function change_visibility(id_div)
{
	var lien_id="lien_"+id_div;
	if(document.getElementById(id_div).style.visibility == 'hidden')
		{
			document.getElementById(id_div).style.visibility = 'visible';
			document.getElementById(id_div).style.height = 'auto';
			document.getElementById(lien_id).innerHTML = 'Notes [-]';
		}
	else
		{
			document.getElementById(id_div).style.visibility = 'hidden';
			document.getElementById(id_div).style.height = '0';
			document.getElementById(lien_id).innerHTML = 'Notes [+]';
		}

}