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"> body {counter-reset:section;} h1 {counter-reset:subsection;} h1:before { counter-increment:section; content:"Section " counter(section) ". "; } h2:before { counter-increment:subsection; content:counter(section) "." counter(subsection) " "; } </style> </head> <body> <p><b>注释：</b> !DOCTYPE，那么 Internet Explorer 8 counter-increment 属性。</p> <h1>HTML tutorials</h1> <h2>HTML Tutorial</h2> <h2>XHTML Tutorial</h2> <h2>CSS Tutorial</h2> <h1>Scripting tutorials</h1> <h2>JavaScript</h2> <h2>VBScript</h2> <h1>XML tutorials</h1> <h2>XML</h2> <h2>XSL</h2> </body> </html>
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