51help TIY
码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <head> <style type="text/css"> [lang|=en] { color:red; } </style> </head> <body> <h1>式：</h1> <p lang="en">Hello!</p> <p lang="en-us">Hi!</p> <hr /> <h1>式：</h1> <p lang="us">Hi!</p> <p lang="zh">Hao!</p> </body> </html>
查看结果: