function Masque_OBJ(){
	Obj = document.getElementById('tableau_visible');
	switch(Obj.style.display) {
		case Obj.style.display='block':
		Obj.style.display = "none";
		break;
		case Obj.style.display='none':
		Obj.style.display = "block";
		break;
	}
}



function Masque_OBJMULTI(signe){

	Obj = document.getElementById('tableau_visible' + signe);

	switch(Obj.style.display) {

		case Obj.style.display='block':

		Obj.style.display = "none";
		break;

		case Obj.style.display='none':
		Obj.style.display = "block";
		break;

	}
}