📄 tryit_view.asp@filename=try_dom_option_index

📁 W3Schools tutorial..web designing

💻 ASP@FILENAME=TRY_DOM_OPTION_INDEX

字号:

<html>
<head>
<script type="text/javascript">
function getIndex()
{
var x=document.getElementById("mySelect");
alert(x.selectedIndex);
}
</script>
</head>
<body>

<form>
Select your favorite fruit:
<select id="mySelect">
  <option>Apple</option>
  <option>Orange</option>
  <option>Pineapple</option>
  <option>Banana</option>
</select>
<br /><br />
<input type="button" onclick="getIndex()" value="Alert index of selected option">
</form>

</body>
</html>

⌨️ 快捷键说明

复制代码 Ctrl + C

搜索代码 Ctrl + F

全屏模式 F11

切换主题 Ctrl + Shift + D

显示快捷键 ?

增大字号 Ctrl + =

减小字号 Ctrl + -