function show(rid)
{
    document.getElementById(rid).style.display = "block";
}

function hide(rid)
{
    document.getElementById(rid).style.display = "none";
}

function hideEmail()
{
	document.getElementById('email').value = '';
}
			
function showEmail()
{
	if (document.getElementById('email').value == '') {
	document.getElementById('email').value = 'Votre adresse e-mail...';
	}
}

function check(box)
{
	document.getElementById(box).checked = true;
}