The vertical horizontal center below IE 8

<style>.box{width:300px; height:300px; background: #ccc; text-align:center;}. line{display:inline-block; height:100%; width:0px; vertical-align:middle;}. asas{Display:inline-block;} </style>
In fact, there is a way to implement the content of the:<button></button> tag automatically center, but this writing needs to modify the style, the General people will not use this way, because it does not conform to the front-end code design ideas.
IE6 you want to center the content
. Building{width:100%;height:100%;text-align:center;}
<div class= "Building" >

</div>
After my test margin:0,auto; it's useless to pay attention.

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The vertical horizontal center below IE 8