function aggiorna_comuni(select_provincia, select_comune){
	
				 var codice_provincia = select_provincia.options[select_provincia.selectedIndex].value;
		
						try{
						
						 new Ajax.Updater({ success: 'div_comune' }, 'getcomuni.php?provincia='+codice_provincia +'&update='+Math.random()*99999999, { method: 'get',
							onLoaded: function(){
								
									//$(select_comune).innerHtml='<option value="200">Prova</option>';
						 
			
								}}  )
							}
						catch(e){
							//alert('ko');
							//select_comune.add('<option value="ss">prova</option>');
							
						}
	}