源代码:
<!DOCTYPE html> <html> <head> <script> function getIndex() { var x=document.getElementById("mySelect"); alert(x.selectedIndex); } </script> </head> <body> <form> 你喜欢的水果是： <select id="mySelect"> <option>Apple</option> <option>Orange</option> <option>Pineapple</option> <option>Banana</option> </select> <br><br> <input type="button" onclick="getIndex()" value="弹出选中项"> </form> </body> </html>
运行结果：