选择的分类选择，经测试ie和ff都能很好的支持该元素
<！Doctype HTML公共 - // W3C // DTD XHTML 1.0严格// http://www.w3.org/tr/xhtml1/dtd/xhtml1-strict.dtd> <html xmlns = http：//www.w3.org/1999/xhtml> <头> <title> runcode </title> <meta http-equiv = content-type content = text/html; charset = UTF-8 /> <meta name =作者content = sheneyan /> </head> <身体> <Select> <optgroup label = a> <选项> A1 </option> <选项> A2 </option> <选项> A3 </option> </optgroup> <optgroup标签= b> <选项> B1 </option> <选项> B2 </option> <选项> B3 </option> </optgroup> </select> </body> </html> |