在线运行代码 - 菜鸟教程

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(cainiaoplay.com)</title>
<script>
function displayResult(){
  alert(document.getElementById("mySelect").name);
}
</script>
</head>
<body>

<form>
<select name="mySelect" id="mySelect">
  <option>Apple</option>
  <option>Pear</option>
  <option>Banana</option>
  <option>Orange</option>
</select>
</form>
<button type="button" onclick="displayResult()">显示下拉列表的名称</button>

</body>
</html>
源代码

动行结果
