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源代码：
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<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>小鸟启蒙(facesoho.com)</title> <script> function removeLastOption(){ var x=document.getElementById("mySelect"); if (x.length>0){ x.remove(x.length-1); } } </script> </head> <body> <form> <select id="mySelect"> <option>Apple</option> <option>Pear</option> <option>Banana</option> <option>Orange</option> </select> <input type="button" onclick="removeLastOption()" value="移除最后一个选项"> </form> </body> </html>
运行结果