​x
 
<!DOCTYPE html>
<html>
<head>
<script>
function getOption() {
  var obj = document.getElementById("mySelect");
  document.getElementById("demo").innerHTML = 
  obj.options[obj.selectedIndex].text;
}
</script>
</head>
<body>
​
<form>
请选择您喜欢的水果：
<select id="mySelect">
  <option>Apple</option>
  <option>Orange</option>
  <option>Pineapple</option>
  <option>Banana</option>
</select>
<br><br>
<input type="button" onclick="getOption()" value="点击这里">
</form>
​
<p id="demo"></p>
​
</body>
</html>
​