olé olé:
codice:
<html>
<head>

<script type="text/javascript">

var level = 0;
var leaving  = 0;

function run(incoming){
 if(incoming != leaving){
 level++;
 alert(level);
 }
leaving = incoming;
}
</script>

</head>
<body bgcolor="#008000">
 <h1>Enzaccio' s Page</h1>

<div align="center">
 <input name="choice" value="" type="radio" onclick='run("one");'  >

 <input name="choice" value="" type="radio" onclick='run("two");'  >

 <input name="choice" value="" type="radio" onclick='run("three");'>

</div>

</body>
</html>