function fadeIn (id, duree) {
	if (duree == 'undefined') duree = 10 ;
	for ( t = 0 ; t <= 10 ; t++ ) {
		setTimeout("document.getElementById('"+id+"').className='transparence"+(t*10)+"';document.getElementById('"+id+"').style.display='block';", t*duree);

	}
}

function fadeOut (id) {
	if ( document.getElementById(id).style.display == 'block' || document.getElementById(id).style.display == 'inline' ) {
		for ( t = 10 ; t >= 0 ; t-- ) {
			setTimeout("document.getElementById('"+id+"').className='transparence"+(t*10)+"';", (10-t)*10);
		}
		setTimeout("document.getElementById('"+id+"').style.display='none';", 150);
	}
}