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HTML5? HTML4? ???

1. ?? ??? HTML4 ??? ?????.

???? <font> ? <center>? ?? ?? ?? ?? ??? ?????.

?? ??? ??: acronym, applet, basefont, big, center, dir,font,frame,frameset, isindex, noframes,strike,tt

2.

?? ???? ?? ??: ??, ???, URL ? ?? ???? ??: <section>, <video>, <progress>, <nav>, <meter> ;,

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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>文檔標(biāo)題</title> </head> <body> HTML5 </body> </html>