有时候我们会有这样的需求，如图，aside是导航或者某些链接，右边的main是显示重要的内容，左边需要定宽，右边的main能够自适应剩余的宽度：
<!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"> <head> <title>test</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta http-equiv="Content-Language" content="zh-CN" /> <meta name="Keywords" content="" /> <meta name="Description" content="" /> <!-- <link rel="stylesheet" href="style/.css" type="text/css" /> --> <style type="text/css"> *{margin:0; padding:0;} /* div{border:1px solid #CCC;} */ .home{width:70%; min-width:270px;margin:0 auto;} .header{height:80px; width:100%; background:#CCC} .nav{height:50px; width:100%; background:#bbb} .content{} .content .aside{width:260px; height:400px; float:left; background:#999} .content .main{height:400px; margin-left:260px; overflow:hidden;zoom:1; background:#eee} .footer{height:80px; background:#888;} </style> </head> <body> <div class="home"> <div class="header"> header </div> <div class="nav"> nav </div> <div class="content"> <div class="aside">aside</div> <div class="main">main</div> </div> <div class="footer"> footer </div> </div> </body> </html>