结构
html head body div span
meta信息
DOCTYPE title link meta style
文本
p h1, h2, h3, h4, h5, h6 strong em abbr acronym address bdo blockquote cite q code ins del dfn kbd pre samp var br
链接
a base
图象和对象
img area map object param
列表
ul ol li dl dt dd
表格
table tr td th tbody thead tfoot col colgroup caption
表单
form input textarea select option optgroup button label fieldset legend
scripting
script noscript
表现
b, i, tt, sub, sup, big, small, hr
