disabled 属性可设置或返回是否禁用单选按钮。
radioObject.disabled=true|false
下面的例子禁用了该单选按钮：
<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>
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