Hola Pepe-Web
Código PHP:
<html>
<head>
<script language="javascript">
document.onkeydown = function(){
if(window.event && window.event.keyCode == 122){
window.event.keyCode = 505;
}
if(window.event && window.event.keyCode == 505){
return false;
}
}
</script>
</head>
<body>
<form name="frm">
<h1><b>ANULACIÓN DE LA TECLA TECLA F11</b></h1>
</form>
</body>
</html>
Suerte
