function tour() {
	document.getElementById("tour").style.visibility= "visible"; 
	document.getElementById("news").style.visibility= "hidden"; 
	document.getElementById("workshop").style.visibility= "hidden"; 
	document.getElementById("tourconte").style.visibility= "hidden"; 
}

function news() {
	document.getElementById("tour").style.visibility= "hidden";
	document.getElementById("news").style.visibility= "visible"; 
	document.getElementById("workshop").style.visibility= "hidden"; 
	document.getElementById("tourconte").style.visibility= "hidden"; 
}

function workshop() {
	document.getElementById("tour").style.visibility= "hidden"; 
    document.getElementById("workshop").style.visibility= "visible"; 
	document.getElementById("news").style.visibility= "hidden"; 
	document.getElementById("tourconte").style.visibility= "hidden"; 
}