51help TIY
码：
<html> <head> <script type="text/javascript"> function disable() { document.getElementById("gnome").disabled=true } </script> </head> <body> <form> Human: <input id="human" type="radio" name="creature" value="Human" /> <br /> Animal: <input id="animal" type="radio" name="creature" value="Animal" /> <br /> Gnome: <input id="gnome" type="radio" name="creature" value="Gnome" /> <br /><br /> <input type="button" onclick="disable()" value="Disable choice" /> </form> </body> </html>
查看结果: