css - Why do I need `position: absolute` in making side-by-side 2x2 square? -

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i use method here in below example.

<!-- vim: set nowrap:--> <html> <style type="text/css">         #titleimg{                 <!--no use in code makes -->                                    <!--things work odd reason?!-->                 position:absolute; <!--if remove this, failure --not 2x2.-->                                    <!--it becomes one-after-another after rem.-->                                    <!--why?-->         }         li{                 width:190px;                 height:190px;                 display: block;                 float: left;                 margin: 5px;         } </style> <body>         <center>                  <ul style="width:400px; height:400px; text-align:center;">                         <li>                                 <img    id="titleimg"                                 src="../pictures/logos/logo.png"                                  style="width:100%;height:100%">                          </li>                         <li> </li>                         <li> </li>                 </ul>         </center> </body>

you don't think. here's updated jsfiddle example of believe trying accomplish. note: never use <center></center> tags - not practice. instead set parent display: block , margin 0 auto.

here new live example

and code:

html

<ul>     <li> <img src="http://www.woodlands-junior.kent.sch.uk/customs/images/uk.jpg"></li>     <li> <img src="http://www.crwflags.com/fotw/images/u/us.gif"> </li>     <li> <img src="http://www.enchantedlearning.com/school/canada/flagbig.gif"> </li> </ul>

​ css

ul {     display: block;      margin: 0 auto; }  li {     width:190px;     height:190px;     display: block;     float: left;     margin: 5px;     overflow: hidden; }​

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