本文介绍了如何让代码在页面上实现居中显示的效果，并对比了居中前后代码的视觉差异。
不居中的代码如下（js里的）：
[img]http://dl.iteye.com/upload/attachment/170435/262d1a18-bea2-31ce-9855-f8b8fdbe4413.png[/img]
不居中的效果：
[img]http://dl.iteye.com/upload/attachment/170440/63fa86af-84a5-3651-af2d-fffc9fcdf152.png[/img]
居中代码：
[img]http://dl.iteye.com/upload/attachment/170451/526e8f8b-136c-31e8-9c9f-0c15174720b8.png[/img]
效果：
[img]http://dl.iteye.com/upload/attachment/170453/2df0e820-47cb-3d56-88a8-5930fe1a9727.png[/img]
[img]http://dl.iteye.com/upload/attachment/170435/262d1a18-bea2-31ce-9855-f8b8fdbe4413.png[/img]
不居中的效果：
[img]http://dl.iteye.com/upload/attachment/170440/63fa86af-84a5-3651-af2d-fffc9fcdf152.png[/img]
居中代码：
[img]http://dl.iteye.com/upload/attachment/170451/526e8f8b-136c-31e8-9c9f-0c15174720b8.png[/img]
效果：
[img]http://dl.iteye.com/upload/attachment/170453/2df0e820-47cb-3d56-88a8-5930fe1a9727.png[/img]
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