<br>select的分類選擇,經測試IE和FF都能很好的支持該元素 <br> <br>!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"<br>"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <br><br><br><title>runcode</title> <br><meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <br><meta name="Author" content="Sheneyan"> <br><br><br><select><br><optgroup label="a"> <br><option></option> <br><option></option> <br>a1<option></option> <br>a2</optgroup> <br><optgroup label="b">a3<br><option></option> <br>點<option></option>b1<br><option></option>b2<br> </optgroup> <br>b3</select><br><br>
