<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Floated Two Col Layout</title> <style type="text/css"> <!-- body { margin-top:0px; } #wrapper { 800px; margin:0 auto; } #branding { background-color:#CCC; height:100px; } #mainNav { float: left; 30%; /*思考怎么宽度用百分比时布局出现错位，当换成准确的px值时就正常了。为什么会这样呢？ 不可能不可以用百分比吧！我再将width改成100%，用firebug观察宽度是否有什么问题。 如下图１所示，奇怪的是为什么会无端多出左边的部分内边距。明白问题出在了什么地方于 是加上如下三行代码，布局显示正常了。 list-style-type:none; padding:0; margin:0; */ } #content { float:right; 70%; position:relative; } #footer { float:left; 100%; background-color:#CCC; height:80px; } --> </style> </head> <body> <div id="wrapper"> <div id="branding"> <h1>Branding</h1> </div> <div id="content"> <h1>Lorem ipsum dolor</h1> <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla.</p> <h2>Ea commodo consequat</h2> <p>Ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi. Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper.</p> <p>Ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi. Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh.</p> <h2>Magna aliquam erat volutpat</h2> <p>Magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi. Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</p> <p>Aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi. Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</p> </div> <ul id="mainNav"> <li class="first"><a href="#">Home</a></li> <li><a href="#">About</a></li> <li><a href="#">News</a></li> <li><a href="#">Products</a></li> <li><a href="#">Services</a></li> <li><a href="#">Clients</a></li> <li><a href="#">Case Studies</a></li> </ul> <div id="footer"> <p>Footer</p> </div> </div> </body> </html> 提示：您可以先修改部分代码再运行 (图一)
(图一)