1.块级标签（独占一行）
H系列标签，p标签，div标签
2.行内标签
span标签
3.form标签
<form action="表单提交数据的地址" method=“GET/POST”></form>
3.1文本输入框
<input type="text" />
3.2密码输入框
<input type="password" />
3.3按钮
<input type="button" value=“按钮” />
3.4提交
<input type="submit" value="提交"/>
3.5单选
<input type="radio" name="radio1" value="radio1" checked="checked"/><input type="radio" name="radio1" value="radio2"/>
3.6多选
<input type="checkbox" name="checkbox1" value="checkbox1"/><input type="checkbox" name="checkbox1" value="checkbox2"/>
3.7上传
<input type="file" name="filename"/>需要指定<form enctype="multipart/form-data">
3.8重置
<input type="reset" value="重置" />
3.9多行文本框
<textarea name="moretext"></textarea>
3.10.1下拉框
<select name="select_test" >size="1"#控制显示长度multiple="multiple"#控制是否多选 <option value="1" >1</option> <option value="2" >2</option> <option value="3" >3</option></select>
3.10.2select分组
<select name="select_test" > <optgroup label="1"> <option value="1" >1.1</option> <option value="2" >1.2</option> <option value="3" >1.3</option> </optgroup> <optgroup label="2"> <option value="1" >2.1</option> <option value="2" >2.2</option> <option value="3" >2.3</option> </optgroup></select>
4.a标签用法
target=""
4.1链接
<a href="http://wwww.baidu.com">baidu</a>
4.2锚点
<a href="#t1">1</a><a href="#t2">2</a><a href="#t3">3</a><div id="#1">1</div><div id="#2">2</div><div id="#3">3</div>
5.img图片
<img src="路径" alt=“图片” title="图片"/>
6.ul无序列表
<ul> <li>1</li> <li>2</li> <li>3</li> </ul>
7.ol有序列表
<ol> <li>1</li> <li>2</li> <li>3</li> </ol>
8.dl
<dl> <dt>标题</dt> <dd>1</dd> <dd>2</dd> <dd>3</dd></dl>
9.table
<table> <thead> <tr> <td>1</td><td>1</td> </tr> </thead> <tbody> <tr> <td>1.1</td><td>1.2</td> </tr> <tr> <td>2.1</td><td>2.2</td> </tr> </tbody> </table>合并单元格<td colspan="2"></td> #横向合并<td rowspan="2"></td>#纵向合并
10.label标签
关联输入框<label for="username">用户名：</label><input id="username" type="text" name="username" />