var b_c_selDestino;
var b_c_selCrucero;
var b_c_destinoSel;
var b_c_salida;
var b_c_anio;
var b_c_grupos;
var b_c_meses;

function initForms(){
	b_c_selDestino = document.getElementById('destino');
	b_c_selCrucero = document.getElementById('crucero');
	b_c_salida = document.getElementById('salida');
	b_c_anio = document.getElementById('anio');
	var recGroup = b_c_selCrucero.getElementsByTagName('OPTGROUP');
	var recMeses = b_c_salida.getElementsByTagName('OPTION');
	
	b_c_grupos = b_c_selCrucero.getElementsByTagName('OPTGROUP');
	b_c_meses = b_c_salida.getElementsByTagName('OPTION');
	
	var recGroupArr = new Array();
	var recMesesArr = new Array();
	
	for(o=0;o<recGroup.length;o++){
		recGroupArr.push(recGroup[o])	
	}
	
	for(l=0;l<recMeses.length;l++){
		recMesesArr.push(recMeses[l])	
	}
	
	b_c_selDestino.onchange = function(){
		b_c_ocultaCrucero(recGroupArr)
		b_c_destinoSel = b_c_selDestino.selectedIndex;
		if(b_c_destinoSel!=0)
		b_c_selCrucero.appendChild(recGroupArr[b_c_destinoSel-1]);
		else{
			for(g=0;g<recGroupArr.length;g++){b_c_selCrucero.appendChild(recGroupArr[g]);}
			b_c_selCrucero.selectedIndex = 0;
		}
	}
	
	/*b_c_anio.onchange = function(){
		var j = 0;
		var selAnio = b_c_anio[b_c_anio.selectedIndex].text;
		if(selAnio == actAnio){j = actMes;}
		b_c_ocultaMeses();
		for(w=j;w<recMesesArr.length;w++){
			b_c_salida.appendChild(recMesesArr[w]);
		}
	}*/
	
	//ocultaCrucero(recGroupArr);
	
	
}

function b_c_ocultaCrucero(){
	while(b_c_grupos.length>0){
		var gl = b_c_grupos[0]
		b_c_selCrucero.removeChild(gl);
	}
}

function b_c_ocultaMeses(){
	while(b_c_meses.length>0){
		var gl = b_c_meses[0]
		b_c_salida.removeChild(gl);
	}
}