简单教程
提交运行
代码编辑器：
<script> function displayResult(){ var x=document.getElementById("mySelect").selectedIndex; var y=document.getElementById("mySelect").options; alert("索引: " + y[x].index + " is " + y[x].text); } </script> <form> 选择你最喜欢的水果: <select id="mySelect"> <option>Apple</option> <option>Orange</option> <option>Pineapple</option> <option>Banana</option> </select> </form> <button type="button" onclick="displayResult()">显示索引</button>
运行结果：