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" />