<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>W3Cschool教程(w3cschool.cn)</title>
</head>
<body>
<form>
<select id="pets">
<option>Cats</option>
<option>Dogs</option>
</select>
</form>
<p>单击下面的按钮禁用下拉列表。</p>
<button onclick="disableElement()">禁用下拉列表</button>
<script>
function disableElement(){
document.getElementById("pets").disabled=true;
}
</script>
</body>
</html>
