html运行实例（hdom_select_selectedindex）-搜寻教程库

代码示例：（标识：hdom_select_selectedindex）

<!DOCTYPE html>
<html>
<head>
<script>
function getIndex() {
  document.getElementById("demo").innerHTML =
  document.getElementById("mySelect").selectedIndex;
}
</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="getIndex()" 
value="显示所选选项的索引">
</form>

<p id="demo"></p>

</body>
</html>