function rollover(id,nb) {
	
	for(var i = 1; i <= nb; i++) { 
	
		document.getElementById("sous-type_"+i).style.display = "none";
	
	}
	
	document.getElementById("sous-type_"+id).style.display = "block";
	
}

function imagehover(id,url) {
	
	document.getElementById(id).src = url;
	
}