var arrayIngles = new Array ();   
arrayIngles[0] = null;
arrayIngles[1] = "Madrid";
arrayIngles[2] = "Barcelona";
arrayIngles[3] = "Marbella";
arrayIngles[4] = "Salamanca";
arrayIngles[5] = "Valencia";

var arrayFrances = new Array ();   
arrayFrances[0] = null;
arrayFrances[1] = "Madrid";
arrayFrances[2] = "Barcelona";
arrayFrances[3] = "Marbella";
arrayFrances[4] = "Salamanca";
arrayFrances[5] = "Valencia";

var arrayAleman = new Array ();   
arrayAleman[0] = null;
arrayAleman[1] = "Madrid";
arrayAleman[2] = "Barcelona";
arrayAleman[3] = "Marbella";
arrayAleman[4] = "Salamanca";
arrayAleman[5] = "Valencia";

var arrayEspanol = new Array ();   
arrayEspanol[0] = null;
arrayEspanol[1] = "Madrid";
arrayEspanol[2] = "Barcelona";
arrayEspanol[3] = "Marbella";
arrayEspanol[4] = "Salamanca";
arrayEspanol[5] = "Valencia";

var arrayChino = new Array ();   
arrayChino[0] = null;
arrayChino[1] = "Madrid";
arrayChino[2] = "Barcelona";
arrayChino[3] = "Marbella";
arrayChino[4] = "Salamanca";
arrayChino[5] = "Valencia";

var arrayCatalan = new Array ();   
arrayCatalan[0] = null;
arrayCatalan[1] = "Barcelona";




function clearFields(){
var selector2 = document.getElementById('school')
var optNum= selector2.length
	for ( var i = 1;i < optNum;i++ )   // clear all the existing fields
	{ 
	selector2.options[selector2.length -1] = null; };
};

function fillSelect(arrayName){
var selector = document.getElementById('school')
clearFields();

var max= arrayName.length 

	for ( var i = 1;i < max;i++ )      // write the new ones
	{ 	
	var schoolOpt = arrayName[i]
	selector.options[selector.length] = new Option(schoolOpt,schoolOpt) ;  
};
};

function lang2city () {

var langValue = document.getElementById('idioma').value

if ( langValue == 'Ingles' ) {
	fillSelect(arrayIngles);
	}
if ( langValue == 'Frances' ) {
	fillSelect(arrayFrances);
	}
if ( langValue == 'Aleman' ) {
	fillSelect(arrayAleman);
	}
if ( langValue == 'Espanol' ) {
	fillSelect(arrayEspanol);
	}
if ( langValue == 'Chino' ) {
	fillSelect(arrayChino);
	}
if ( langValue == 'Catalan' ) {
	fillSelect(arrayCatalan);
	}
if ( langValue == 'Sin seleccion') {clearFields() }
};