Change position in observation

HTML

<!DOCTYPE HTML>

<HTML>

<head>

    <meta charset="    UTF-8">

    <title>position</title>

    <link rel="stylesheet" type="text/css" href="indextype.css">

</head>

<body>

    </form>

    <div class="box" id="one">One</div>

    <div class="box" id="two">Two</div>

    <div class="box" id="three">Three</div>

    <div class="box" id="four">Four</div>

    <br>

</body>

</HTML>

CSS

.box {

  display: inline-block;

  width: 100px;

  height: 100px;

  background: red;

  color: white;

}

#two {

  /*position:static;*/

  top: 20px;

  left: 20px;

  background: blue;

}

CSS代码，当改变position的值时：

0 没position时：

This is the default value.

The element is positioned according to the normal flow of the document, and then offset relative to itself based on the values of top, right, bottom, and left. The offset does not affect the position of any other elements; thus, the space given for the element in the page layout is the same as if position were static.

元素根据文档的正常流进行定位，然后根据顶部、右侧、底部和左侧的值相对于自身进行偏移。偏移量不影响任何其他元素的位置;因此，页面布局中元素的空间与静态位置相同。

The element is removed from the normal document flow, and no space is created for the element in the page layout. It is positioned relative to the initial containing block established by the viewport,

The element is removed from the normal document flow, and no space is created for the element in the page layout. It is positioned relative to its closest positioned ancestor, if any; otherwise, it is placed relative to the initial containing block. Its final position is determined by the values of top, right, bottom, and left.

The element is positioned according to the normal flow of the document, and then offset relative to its nearest scrolling ancestor and containing block (nearest block-level ancestor), including table-related elements, based on the values of top, right, bottom, and left. The offset does not affect the position of any other elements.

由于有些效果一样，于是我增加网页显示的长度，出现了其他的效果，

我把box加在在以前写过的html后面，出现了下面的效果：

传视频在博客上，利用优酷的话，要先认证。我还在认证，过几天再传视频的效果图啦。

0000

<!DOCTYPE html>     <!--浏览器得知自己的处理内容是html-->

<!--<!DOCTYPE html>-->

 <!--注释-->

<!--<html lang="en">

    <!--文档中html部分的开始，en英语zh中文-->

<html>

<head>    <!--提供有关文档的内容和注释信息的-->

    <meta charset="UTF-8">        <!--一种编码方式-->

    <title>blogs</title>    <!--head里面必须有title元素-->

    <link rel="stylesheet" type="text/css" href="indextype.css">>

</head>

<body>

    <!--hypertext reference-->

    <a href="https://www.cnblogs.com/" target="_blank">blogs a</a>

    <a href="https://www.cnblogs.com/"> blogs b</a>

    <a href="https://www.cnblogs.com/" target="_self">blogs c</a>

***************************************

    <!--bold type-->

    <b>blogs</b>

    <!--emphasis-->

    <em>blogs</em>

    <!--下划线-->

    <u>blogs</u>

    <!--中间横线-->

    <s>blogs</s>

    <hl>

        啦啦啦啦啦啦啦啦

    </hl>

******************************************

    <table  border="1px" align="center">

        <thead>

        <tr>    <!--加粗居中-->

            <th>用户名</th>

            <th>性别</th>

            <th>密码</th>

        </tr>

        </thead>

        <tbody>

        <tr>

            <td>Admin</td>

            <td>man</td>

            <td>123</td>

        </tr>

        <tr>

            <td>Admin12334567</td>

            <td>man</td>

            <td>123</td>

        </tr>

        </tbody>

        <tfoot>

        <tr>

            <td>用户名</td>

            <td>性别</td>

            <td>密码</td>

        </tr>

        </tfoot>

    </table>

<br>        <!--换行-->

<table border="1px">

    <tr>

        <th rowspan="2">444</th>    <!--行row-->

        <th>444</th>

        <th>444444</th>

        <th>444</th>

    </tr>

    <tr>

        <td colspan="2">sdsd</td> <!--合并列单元格column -->

        <td>sdss</td>

    </tr>

    <tr>

        <td>sdsds</td>

        <td>sdsd</td>

        <td>sdsd</td>

        <td>sdsd</td>

    </tr>

</table>

******************************

<ol>

    <li>a</li>

    <li>a</li>

    <li>a</li>

</ol>

<ol reversed>

    <li>a</li>

    <li>a</li>

    <li>a</li>

</ol>

<ol type="a"><!--a A I -->

    <li>a</li>

    <li>a</li>

    <li>a</li>

</ol>

<ol>

    <li>何将用户选择的内</li>

    <ol type="a">

    <li>他们会提到Flash</li>

    <li>中关键技术的支持的改进</li>

    </ol>

</ol>

<ul>

    <li>a</li>

    <li>a</li>

    <li>a</li>

</ul>

********************************************************************************

<!--        表单        -->

<for method="get" action="6htmlform.php">

    <input type="text">

    <!--=<input>-->

    <br><br>

    <input type="text" value="blogs"><!--占位符-->

    <br><br>

    <input type="text" placeholder="blogs"><!--不占文本框内-->

    <br><br>

    <input type="text" placeholder="blogs" maxlength="8"><!--最大能输入的字符-->

    <br><br>

    <input type="text" placeholder="blogs" size="50"><!--拓宽单行文本框-->

    <br><br>

    <input type="text" value="blogs" readonly><!--只读-->

    <br><br>

    <input type="password" placeholder="密码">

    <textarea rows="20">aaaaaaaaaaadddddddddddddddggggggggggggggggggggggggaaa</textarea>

    <input type=button value="按钮">

    <button>按钮</button>         <!--js合作并且作为绑定事件的-->

    <input type="submit" value="提交"><!--提交表单-->

    <!--button>input button>input submit-->

    <input type="rang" min="-100" max="200" step="100">

    <input type="rang" min="-100" max="200" step="100" value="-100"><!--数字滑动-->

    <input type="number" min="-100" max="200"  value="-100"><!--手动输入数字-->

    <input type="checkbox">选择1<!--选择1-->

    <input type="radio">选择2

    你喜欢什么？

    <br>

    <input type="radio" name="d" checked>苹果

    <input type="radio" name="d">葡萄

    <input type="radio" name="d">琵琶

    <select>

        <option>苹果</option>

        <option>苹果2</option>

        <option>苹果3</option>

    </select>

    <input type="text" list="datalist111">

    <datalist id="datalist111">

        <option>苹果</option>

        <option>苹果2</option>

        <option>苹果3</option>

    </datalist>

    <br>

    <br>

    <br>

    <br>

    <br>

    <br>

    <br>

    <br>

    <br>

    <!--<input type ="email">

    <input type="tel">

    <input type="url">

    <input type="date">

    <input type="color">

    <input type="hidden" value="123">-->

    <input type="image" src="111.png" witn="80px"><!--图片按钮-->

    <input type="file" multiple><--上传多个文件-->

    <br>

    <br>

    <div class="box" id="one">One</div>

    <div class="box" id="two">Two</div>

    <div class="box" id="three">Three</div>

    <div class="box" id="four">Four</div>

    <br>

    <br>

    <br>

    <br>

    <!--

<div class="wrapper">

  <div class="one">One</div>

  <div class="two">Two</div>

  <div class="three">Three</div>

  <div class="four">Four</div>

  <div class="five">Five</div>

  <div class="six">Six</div>

</div>-->

</body>

</html>

</form>

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