function ch_menu(id_r){
var a_c=new Array();
a_c[0]=new Array(19,'Agrigento',1);
a_c[1]=new Array(2,'Alessandria',2);
a_c[2]=new Array(10,'Ancona',3);
a_c[3]=new Array(1,'Aosta',4);
a_c[4]=new Array(9,'Arezzo',5);
a_c[5]=new Array(10,'Ascoli Piceno',6);
a_c[6]=new Array(2,'Asti',7);
a_c[7]=new Array(15,'Avellino',8);
a_c[8]=new Array(16,'Bari',9);
a_c[9]=new Array(6,'Belluno',10);
a_c[10]=new Array(15,'Benevento',11);
a_c[11]=new Array(3,'Bergamo',12);
a_c[12]=new Array(2,'Biella',13);
a_c[13]=new Array(8,'Bologna',14);
a_c[14]=new Array(5,'Bolzano',15);
a_c[15]=new Array(3,'Brescia',16);
a_c[16]=new Array(16,'Brindisi',17);
a_c[17]=new Array(20,'Cagliari',18);
a_c[18]=new Array(19,'Caltanissetta',19);
a_c[19]=new Array(14,'Campobasso',20);
a_c[20]=new Array(15,'Caserta',21);
a_c[21]=new Array(19,'Catania',22);
a_c[22]=new Array(17,'Catanzaro',23);
a_c[23]=new Array(11,'Chieti',24);
a_c[24]=new Array(3,'Como',25);
a_c[25]=new Array(17,'Cosenza',26);
a_c[26]=new Array(3,'Cremona',27);
a_c[27]=new Array(17,'Crotone',28);
a_c[28]=new Array(2,'Cuneo',29);
a_c[29]=new Array(19,'Enna',30);
a_c[30]=new Array(10,'Fermo',106);
a_c[31]=new Array(8,'Ferrara',31);
a_c[32]=new Array(9,'Firenze',32);
a_c[33]=new Array(16,'Foggia',33);
a_c[34]=new Array(8,'Forlė Cesena',34);
a_c[35]=new Array(13,'Frosinone',35);
a_c[36]=new Array(4,'Genova',36);
a_c[37]=new Array(7,'Gorizia',37);
a_c[38]=new Array(9,'Grosseto',38);
a_c[39]=new Array(4,'Imperia',39);
a_c[40]=new Array(14,'Isernia',40);
a_c[41]=new Array(11,'L\'Aquila',41);
a_c[42]=new Array(4,'La Spezia',42);
a_c[43]=new Array(13,'Latina',43);
a_c[44]=new Array(16,'Lecce',44);
a_c[45]=new Array(3,'Lecco',45);
a_c[46]=new Array(9,'Livorno',46);
a_c[47]=new Array(3,'Lodi',47);
a_c[48]=new Array(9,'Lucca',48);
a_c[49]=new Array(10,'Macerata',49);
a_c[50]=new Array(3,'Mantova',50);
a_c[51]=new Array(9,'Massa Carrara',51);
a_c[52]=new Array(18,'Matera',52);
a_c[53]=new Array(19,'Messina',53);
a_c[54]=new Array(3,'Milano',54);
a_c[55]=new Array(8,'Modena',55);
a_c[56]=new Array(15,'Napoli',56);
a_c[57]=new Array(2,'Novara',57);
a_c[58]=new Array(20,'Nuoro',58);
a_c[59]=new Array(20,'Oristano',59);
a_c[60]=new Array(6,'Padova',60);
a_c[61]=new Array(19,'Palermo',61);
a_c[62]=new Array(8,'Parma',62);
a_c[63]=new Array(3,'Pavia',63);
a_c[64]=new Array(12,'Perugia',64);
a_c[65]=new Array(10,'Pesaro e Urbino',65);
a_c[66]=new Array(11,'Pescara',66);
a_c[67]=new Array(8,'Piacenza',67);
a_c[68]=new Array(9,'Pisa',68);
a_c[69]=new Array(9,'Pistoia',69);
a_c[70]=new Array(7,'Pordenone',70);
a_c[71]=new Array(18,'Potenza',71);
a_c[72]=new Array(9,'Prato',72);
a_c[73]=new Array(19,'Ragusa',73);
a_c[74]=new Array(8,'Ravenna',74);
a_c[75]=new Array(17,'Reggio Calabria',75);
a_c[76]=new Array(8,'Reggio Emilia',76);
a_c[77]=new Array(13,'Rieti',77);
a_c[78]=new Array(8,'Rimini',78);
a_c[79]=new Array(13,'Roma',79);
a_c[80]=new Array(6,'Rovigo',80);
a_c[81]=new Array(15,'Salerno',81);
a_c[82]=new Array(8,'San Marino',104);
a_c[83]=new Array(20,'Sassari',82);
a_c[84]=new Array(4,'Savona',83);
a_c[85]=new Array(9,'Siena',84);
a_c[86]=new Array(19,'Siracusa',85);
a_c[87]=new Array(3,'Sondrio',86);
a_c[88]=new Array(16,'Taranto',87);
a_c[89]=new Array(11,'Teramo',88);
a_c[90]=new Array(12,'Terni',89);
a_c[91]=new Array(2,'Torino',90);
a_c[92]=new Array(19,'Trapani',91);
a_c[93]=new Array(5,'Trento',92);
a_c[94]=new Array(6,'Treviso',93);
a_c[95]=new Array(7,'Trieste',94);
a_c[96]=new Array(7,'Udine',95);
a_c[97]=new Array(3,'Varese',96);
a_c[98]=new Array(6,'Venezia',97);
a_c[99]=new Array(2,'Verbania',98);
a_c[100]=new Array(2,'Vercelli',99);
a_c[101]=new Array(6,'Verona',100);
a_c[102]=new Array(17,'Vibo Valentia',101);
a_c[103]=new Array(6,'Vicenza',102);
a_c[104]=new Array(13,'Viterbo',103);
  var objselect = document.getElementById('select_citta');
	for(i=objselect.length;i>0;i--){
		objselect.options[i]=null;
	}
	objselect.options[0] = new Option('Tutte le provincie','0');
	var ind_select = 1;
	for(i=0;i<a_c.length;i++){
		if(a_c[i][0]==id_r || id_r=='0'){
			objselect.options[ind_select] = new Option(a_c[i][1], a_c[i][2]);
			ind_select++;
		}
	}
}