حدد 的分类选择 ، 经测试 أي 和 ff 都能很好的支持该元素
<! doctype html public -// w3c // dtd xhtml 1.0 Strict // en http://www.w3.org/tr/xhtml1/dtd/xhtml1-strict.dtd> <html xmlns = http: //www.w3.org/1999/xhtml> <head> <title> RunCode </itlect> <meta http-equiv = content-type content = text/html ؛ charset = utf-8 /> <meta name = upiter content = sheneyan /> </head> <body> <select> <optgroup label = a> <Point> A1 </soph> <Point> A2 </soph> <Spoint> A3 </soph> </ptgroup> <optgroup label = b> <potion> B1 </soph> <Spoint> B2 </soph> <Point> B3 </soph> </ptgroup> </select> </body> </html> |