function changementType() {
	var type = document.getElementById("type").value;
	if (type == "univers1") {
		document.getElementById("univers1").style.display="block";
	} else{
		document.getElementById("univers1").style.display="none";
	}
	if (type == "univers2"){
		document.getElementById("univers2").style.display="block";
	}else{
		document.getElementById("univers2").style.display="none";
	}
	if (type == "univers3"){
		document.getElementById("univers3").style.display="block";
	}else{
		document.getElementById("univers3").style.display="none";
	}
}