代码编辑器：
x
1
<form action="/dy/html/getpost" method="get">2
用户名: <input type="text" name="usr_name">3
加密: <keygen id="myKeygen" name="security">4
<input type="submit">5
</form><br>6
<button onclick="disableKey()">禁用 Keygen 字段</button>7
<button onclick="undisableKey()">启用 Keygen 字段</button>8
<script>9
function disableKey(){10
document.getElementById("myKeygen").disabled=true;11
}12
function undisableKey(){13
document.getElementById("myKeygen").disabled=false;14
}15
</script>16