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DIV常用的居中方法_html/css_WEB-ITnose

WBOY
WBOYOriginal
2016-06-24 11:44:02990browse

一.DIV常用的居中方法:

①利用相对定位设置div外边距自动调整达到居中效果(ps:如果IE浏览器无效果还要在Body里面加上''text-align:center''这个属性,或是外面再加一层DIV,设置属性''text-align:center''),当然居中也有另一种写法:margin-left:auto;margin-right:auto             最重要的是div必须设置width属性

1 <body>2   <div style="width:500px;margin:0 auto">3        .......4   </div>5 </body>

 

②利用left和margin-left两个属性,先将div块设置为margin-left:50%(这表示这个div块的最左边那条边在中间),然后left属性值为div块宽度的负一半,

符号表示div向左边移动宽度的一半。补充说明一下:直接在css中设置left生效的前提是必须设置父容器position:absolute或relative

 1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 2 <html xmlns="http://www.w3.org/1999/xhtml"> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 5 <title>无标题文档</title> 6 <style> 7     #myDiv_1{ 8         width:300px; 9         height:200px;10         background-color:#F00;    11         12         margin-left:50%;13         position:absolute;14         left:-150px;15     }16 </style>17 </head>18 19 <body>20     <div id="myDiv_1"></div>21 </body>22 </html>

 

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