<br><div class="msgheader"> <div class="right"><span style="CURSOR: pointer" onclick="copycode(getid('phpcode64'));"><u>複製程式碼</u></span></div>程式碼如下:</div> <div class="msgborder" id="phpcode64"> <br><select> <br><option value="">1</option> <br><option value="">2</option> <br><option value="">3</option> <br><option value="">4</option> <br><option value="">5</option> <br></select> <br> </div> <br><img src="http://files.jb51.net/file_images/article/201404/20140411150722.png?201431115743" alt=""> <br><br>我不想讓使用者可以選擇345 怎麼辦呢<br><br><div class="msgheader"> <div class="right"><span style="CURSOR: pointer" onclick="copycode(getid('phpcode65'));"><u>複製程式碼</u></span></div>程式碼如下:</div> <div class="msgborder" id="phpcode65"> <br><br>程式碼如下:<br><br> <br><select> value="">1 <br><option value="">2</option> <br><optgroup label="3"></optgroup> <br><optgroup label="4"></optgroup> </select> </div> <optgroup label="5"></optgroup> <br> <img src="http://files.jb51.net/file_images/article/201404/20140411150800.png?201431115820" alt=""><br><br> 這樣就ok了