window.addEvent('domready', function(){

	var req = new Request.HTML({
		url: 'js/modelli.php' , 
 		update: $('scelta_modello'),
		
		onRequest: function(){
			$('scelta_modello').set('html', 'dati in elaborazione');
		},
		
		onSuccess: function(tree, elements, html, js){
	
			 $('scelta_modello').set('html', html);
		},		
		

		onFailure: function(){
			alert('problemi con il server');
		}

	});
	
	$('marca').addEvent('change', function(){
		if($('marca').value > 0){
			if( document.getElementById('scelta_modello').style.display != "block" ) document.getElementById('scelta_modello').style.display = "block";
			req.get({'marca': $('marca').value});
		}else document.getElementById('scelta_modello').style.display = "none";
	});	
		

});