1：块级标签
h1--h6······························································································标题标签
p·····································································································段落标签
hr····································································································分割线
br····································································································换行标签
blockquote························································································引用
pre··································································································预格式
ul li·································································································无序列表
ol li·································································································有序列表
dl dt dd····························································································定义列表
figure·······························································································组合标签
div···································································································分区标签
table tr td th······················································································表格
table属性： rowspan（跨行）、colspan（跨列）属性
border······························································································表格边框
width································································································宽度
height································································································高度
bgcolor······························································································背景颜色
background························································································背景图像
bordercolor·························································································边框颜色
cellpadding························································································文本和单元格之间的距离
cellspansing·······················································································单元格边距
algin·································································································对齐方式
tr td属性：
width··································································································宽度
height·································································································高度
bgcolor·······························································································背景颜色
algin···································································································整行的文本水平对齐方式
valgin·································································································整行的文本垂直对齐方式
表格结构化：
Caption······························································································表格的标题
Thead································································································表格头
Tbody································································································表格体
Tfoot·································································································表格尾
表格的直列化：
colgrounp ························································································对列分组
col································································································· 代表某一列
span属性
行级标签：
Span···································································································文本标签
img
a
i···············································································································斜体
em···········································································································斜体
b··············································································································加粗
strong
small
big
q··············································································································引用
sub
sup
mark
-->