Codice PHP:
<html>
<head>
<title>Ajax</title>
<link rel="StyleSheet" href="js/dtree.css" type="text/css" />
<script language = "javascript" type="text/javascript">
function changeMode(my_check){
if(my_check.id=="ck1"){
if(my_check.checked){
document.getElementById('ck2').disabled=false;
document.getElementById('invia').disabled=true;
}else{
document.getElementById('ck2').disabled=true;
document.getElementById('invia').disabled=false;
}
}else{
document.getElementById('ck1').checked=true;
document.getElementById('invia').disabled=false;
}
}
</script>
</head>
<body>
<table><tr><td><input type="checkbox" id="ck1" value="1" onclick="changeMode(this);"></td></tr>
<tr><td><input type="checkbox" id="ck2" value="1" onclick="changeMode(this);" disabled></td></tr>
<tr><td><input type="button" id="invia" value="invia"></td></tr>
</table>
</body>
</html>