源代码 ：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>开源教程(ossoft.cn)</title> <script> function changeText(){ var x=document.getElementById("mySelect"); x.options[x.selectedIndex].text="甜瓜"; } </script> </head> <body> <form> 选择你最喜欢的水果: <select id="mySelect"> <option>苹果</option> <option>橙子</option> <option>菠萝</option> <option>香蕉</option> </select> <br><br> <input type="button" onclick="changeText()" value="设置你的选项"> </form> </body> </html>
运行结果