<script type="text/javascript">
var regiondb = new Object()
regiondb["africa"] = [{value:"102", text:"Cairo"},
{value:"88", text:"Lagos"},
{value:"80", text:"Nairobi"},
{value:"55", text:"Pretoria"}];
regiondb["asia"] = [{value:"30", text:"Ankara"},
{value:"21", text:"Bangkok"},
{value:"49", text:"Pechino"},
{value:"76", text:"New Delhi"},
{value:"14", text:"Tokyo"}];
regiondb["australia"] = [{value:"64", text:"Suva"},
{value:"12", text:"Sydney"}];
regiondb["europa"] = [{value:"11", text:"Atene"},
{value:"35", text:"Francoforte"},
{value:"3", text:"Londra"},
{value:"15", text:"Madrid"},
{value:"1", text:"Parigi"},
{value:"10", text:"Roma"},
{value:"6", text:"Stoccolma"},
{value:"97", text:"San Pietroburgo"}];
regiondb["noamer"] = [{value:"73", text:"Dallas"},
{value:"71", text:"Los Angeles"},
{value:"5", text:"New York"},
{value:"37", text:"Toronto"}];
regiondb["suamer"] = [{value:"65", text:"Buenos Aires"},
{value:"31", text:"Caracas"},
{value:"66", text:"Rio di Janeiro"}];
function setCities(chooser) {
var newElem;
var where = (navigator.appName == "Microsoft Internet Explorer") ? -1 : null;
var cityChooser = chooser.form.elements["città"];
while (cityChooser.options.length) {
cityChooser.remove(0);
}
var choice = chooser.options[chooser.selectedIndex].value;
var db = regiondb[choice];
newElem = document.createElement("option");
newElem.text = "Seleziona una città:";
newElem.value = "";
cityChooser.add(newElem, where);
if (choice != "") {
for (var i = 0; i < db.length; i++) {
newElem = document.createElement("option");
newElem.text = db[i].text;
newElem.value = db[i].value;
cityChooser.add(newElem, where);
}
}
}
</script>
</head>
<body >
<div align="center">
<h1>Esempio - Select dinamiche</h1>
<hr>
<form name="form">
Invia la richiesta a:
<select name="continente" onchange="setCities(this)">
<option value="" selected="selected">Seleziona un continente:</option>
<option value="africa">Africa</option>
<option value="asia">Asia</option>
<option value="australia">Australia/Oceania</option>
<option value="europa">Europa</option>
<option value="noamer">Nord America</option>
<option value="suamer">Sud America</option>
</select>_
<select name="città">
<option value="" selected="selected">Seleziona una città:</option>
</select>
</form>
</div>
</body>
</html>
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