w3c 的校验图案
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><p> <a href="http://validator.w3.org/check?uri=referer"><img src="http://www.w3.org/Icons/valid-xhtml10" alt="Valid XHTML 1.0 Transitional" height="31" width="88" /></a></p><p> <a href="http://validator.w3.org/check?uri=referer"><img src="http://www.w3.org/Icons/valid-xhtml10-blue" alt="Valid XHTML 1.0 Transitional" height="31" width="88" /></a></p><p> <a href="http://jigsaw.w3.org/css-validator/"> <img style="border:0;width:88px;height:31px" src="http://jigsaw.w3.org/css-validator/images/vcss" alt="Valid CSS!" /> </a></p> <p><a href="http://jigsaw.w3.org/css-validator/"><img style="border:0;width:88px;height:31px"src="http://jigsaw.w3.org/css-validator/images/vcss-blue" alt="Valid CSS!" /></a></p> 以上内容存为1个html文件，就可以看到w3c的校验图案
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