function mentions_legales () {
	var lightbox = document.getElementById('lightbox');;
	lightbox.style.display='block';
	document.getElementById('mentions_legales').style.display='block';
	document.getElementById('rules').style.display='none';
	document.getElementById('cadeaux').style.display='none';
	document.getElementById('a_gagner').style.display='none';
}
function reglement () {
	var lightbox = document.getElementById('lightbox');;
	lightbox.style.display='block';
	document.getElementById('mentions_legales').style.display='none';
	document.getElementById('rules').style.display='block';
	document.getElementById('cadeaux').style.display='none';
	document.getElementById('a_gagner').style.display='none';
}
function cadeaux () {
	var lightbox = document.getElementById('lightbox');;
	lightbox.style.display='block';
	document.getElementById('mentions_legales').style.display='none';
	document.getElementById('rules').style.display='none';
	document.getElementById('cadeaux').style.display='block';
	document.getElementById('a_gagner').style.display='none';
}
function a_gagner () {
	var lightbox = document.getElementById('lightbox');;
	lightbox.style.display='block';
	document.getElementById('mentions_legales').style.display='none';
	document.getElementById('rules').style.display='none';
	document.getElementById('cadeaux').style.display='none';
	document.getElementById('a_gagner').style.display='block';
}
function close () {
	var lightbox = document.getElementById('lightbox');
	lightbox.style.display='none';
	document.getElementById('mentions_legales').style.display='none';
	document.getElementById('rules').style.display='none';
	document.getElementById('cadeaux').style.display='none';
}

function clearText(theField)
{
	if (theField.defaultValue == theField.value)
	theField.value = '';
}