Gxlsystem TIY Editor
Gxlsystem 在线教程
改变方向
暗黑模式
运行代码
<html> <head> <script type="text/javascript"> function insertOption() { var y=document.createElement('option'); y.text='Kiwi' var x=document.getElementById("mySelect"); try { x.add(y,null); // standards compliant } catch(ex) { x.add(y); // IE only } } </script> </head> <body> <form> <select id="mySelect"> <option>Apple</option> <option>Pear</option> <option>Banana</option> <option>Orange</option> </select> <input type="button" onclick="insertOption()" value="Insert option" /> </form> </body> </html>