<!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" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>Document</title> <style> #container{ width:1000px; height: 1000px; background: yellow; } div{ width:490px; height:490px; background: blue; float:left; margin: 5px; } </style> </head> <body> <div id="container"> <div></div> <div></div> <div></div> <div></div> </div> </body> </html>
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html 5 marign top right bottom left
原文：http://www.cnblogs.com/zy2012/p/3725119.html