摘要： test.html如下：!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"htmlhead id="head" meta http-equiv="Content-Type" content="text/html; charset=utf-8" / titletest/title style type='text/css' img { border: 1px solid red; d 阅读全文