function mostra_accessori(id)  {
	var el = document.getElementById(id);
	if ( el.style.display != 'none' ) {
		el.style.display = 'none';
		document.getElementById('toggler').innerHTML='+ ';
	}
	else {
		el.style.display = '';
		document.getElementById('toggler').innerHTML='– ';
	}
}

function nascondi_accessori(id)  {
	document.getElementById('lista_accessori').style.display='none';
	document.getElementById('toggler').innerHTML='+ ';
}