禁用单选框按钮

<form>

  猫:<input type="radio" name="pet" id="cats"><br> 狗:

  <input type="radio" name="pet" id="dogs">

</form>

<p>单击下面的按钮禁用第一个单选框。</p>

<button onclick="disableElement()">禁用单选框按钮</button>

<script>

  function disableElement() {

    document.getElementById("cats").disabled = true;

  }

</script>