要求:
1.使用2个div完成 2.使用3个div完成 3.使用5个div完成答案:1.使用2个div完成- <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
- <html xmlns="http://www.w3.org/1999/xhtml">
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
- <title>2个DIV()</title>
- <style type="text/css">
- #heng,#shu{left:50%;top:50%;position:absolute; background-color:#f00;}
- #shu{width:50px;height:150px;margin-left:-25px;margin-top:-75px;}
- #heng{width:150px;height:50px;margin-left:-75px;margin-top:-25px;background-color:#f00;}
10.</style>
11.</head>
12.<body>
<div id="heng"></div>
<div id="shu"></div>
15.</body>
16.</html>
2.使用3个div完成- <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
- <html xmlns="http://www.w3.org/1999/xhtml">
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
- <style type="text/css">
- .main{width:150px; height:150px; top:50%; left:50%; position:absolute; margin:-75px 0 0 -75px; border:2px #F00 solid;}
- .heng{width:150px; height:50px; background:#F00; margin-top:50px;}
- .shu{width:50px; height:150px; background:#F00; margin-left:50px; margin-top:-100px;/*margin上边界叠加*/}
- </style>
10.<title>3个DIV()</title>
11.</head>
12.<body>
<div class="main">
<div class="heng"></div>
<div class="shu"></div>
16.</div>
17.</body>
18.</html>
3.使用5个div完成- <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
- <html xmlns="http://www.w3.org/1999/xhtml">
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
- <title>5个DIV()</title>
- <style type="text/css">
- #top,#middle,#left,#right,#bottom{height:50px;width:50px;position:absolute;top:50%;left:50%;}
- #top{margin:-75px 0 0 -25px;background:#F00;}
- #middle{margin:-25px 0 0 -25px;background:#000;}
10.#left{margin:-25px 0 0 -75px;background:#00F;}
11.#right{margin:-25px 0 0 25px;background:#0F0;}
12.#bottom{margin:25px 0 0 -25px;background:#FF0;}
13.</style>
14.</head>
15.<body>
16.<div id="top"></div>
17.<div id="middle"></div>
18.<div id="left"></div>
19.<div id="right"></div>
20.<div id="bottom"></div>
21.</body>
22.</html>