<HTML>
<HEAD>
<SCRIPT LANGUAGE="JavaScript">
function cambio(){with(document.forms.form1){
var texto=new Array(" ","1","2");
var valor=new Array(0,1,2);
ninos.length=0;
ninos.selectedIndex=0;
opcion1= new Option(" ");
opcion1.value=null;
ninos.options[0]=opcion1;
if (adultos.value){
for(i=0;i<adultos.value;i++){
opcion = new Option(texto[i]);
opcion.value=valor[i];
ninos.options[i]=opcion;}}
}}
function ver(){with(document.forms.form1){
ninos.length=0;
ninos.selectedIndex=0;
opcion1= new Option(" ");
opcion1.value=null;
ninos.options[0]=opcion1;
}}
</SCRIPT>
</HEAD>
<BODY>
<FORM METHOD=POST ACTION="" name='form1'>
<select name='adultos' onchange='cambio()'>
<option value=''> </option>
<option value='3'>1</option>
<option value='2'>2</option>
<option value='1'>3</option>
</select>
<select name='ninos'>
<option value=''> </option>
</select>
<input type='button' value='Aceptar' onclick='ver()'>
</FORM>
</BODY>
</HTML>
