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<!DOCTYPE html> <html> <head> <style> 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> <h1>HTML tutorials:</h1> <h2>HTML 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> <p><b>Note:</b> IE8 supports these properties only if a !DOCTYPE is specified.</p> </body> </html>