后记：
最后不得不提的是，这种布局是有局限性的，并不是每个网页都能适合用这种方式来布局。因为流体弹性布局本身存在的缺陷。它不能用于设计得太过华丽、图片丰富的页面，因为有些图片是没有办法做到象上图哪样伸缩的。我想正是因为这个原因，它限制了这种布局的广泛流传。
演示：
运行代码框<!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> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>弹性布局设计（冰极峰原创）</title> <script type="text/javascript"> // JavaScript Document // minmax.js: make IE5+/Win support CSS min/max-width/height // version 1.0, 08-Aug-2003 // written by Andrew Clover <and@doxdesk.com>, use freely /*@cc_on @if (@_win32 && @_jscript_version>4) var minmax_elements; minmax_pro<a href='http://www.itjxue.com/plus/search.php?kwtype=0&keyword=ps&se' target='_blank'><u>ps</u></a>= new Array( new Array('min-width', 'minWidth'), new Array('max-width', 'maxWidth'), new Array('min-height','minHeight'), new Array('max-height','maxHeight') ); // Binding. Called on all new elements. If <body>, initialise; check all // elements for minmax properties function minmax_bind(el) { var i, em, ms; var st= el.style, cs= el.currentStyle; if (minmax_elements==window.undefined) { // initialise when body element has turned up, but only on IE if (!document.body || !document.body.currentStyle) return; minmax_elements= new Array(); window.attachEvent('onresize', minmax_delayout); // make font size listener em= document.createElement('div'); em.setAttribute('id', 'minmax_em'); em.style.position= 'absolute'; em.style.visibility= 'hidden'; em.style.fontSize= 'xx-large'; em.style.height= '5em'; em.style.top='-5em'; em.style.left= '0'; if (em.style.setExpression) { em.style.setExpression('width', 'minmax_checkFont()'); document.body.insertBefore(em, document.body.firstChild); } } // transform hyphenated properties the browser has not caught to camelCase for (i= minmax_props.length; i-->0;) if (cs[minmax_props[i][0]]) st[minmax_props[i][1]]= cs[minmax_props[i][0]]; // add element with properties to list, store optimal size values for (i= minmax_props.length; i-->0;) { ms= cs[minmax_props[i][1]]; if (ms && ms!='auto' && ms!='none' && ms!='0' && ms!='') { st.minmaxWidth= cs.width; st.minmaxHeight= cs.height; minmax_elements[minmax_elements.length]= el; // will need a layout later minmax_delayout(); break; } } } // check for font size changes var minmax_fontsize= 0; function minmax_checkFont() { var fs= document.getElementById('minmax_em').offsetHeight; if (minmax_fontsize!=fs && minmax_fontsize!=0) minmax_delayout(); minmax_fontsize= fs; return '5em'; } // Layout. Called after window and font size-change. Go through elements we // picked out earlier and set their size to the minimum, maximum and optimum, // choosing whichever is appropriate // Request re-layout at next available moment var minmax_delaying= false; function minmax_delayout() { if (minmax_delaying) return; minmax_delaying= true; window.setTimeout(minmax_layout, 0); } function minmax_stopdelaying() { minmax_delaying= false; } function minmax_layout() { window.setTimeout(minmax_stopdelaying, 100); var i, el, st, cs, optimal, inrange; for (i= minmax_elements.length; i-->0;) { el= minmax_elements[i]; st= el.style; cs= el.currentStyle; // horizontal size bounding st.width= st.minmaxWidth; optimal= el.offsetWidth; inrange= true; if (inrange && cs.minWidth && cs.minWidth!='0' && cs.minWidth!='auto' && cs.minWidth!='') { st.width= cs.minWidth; inrange= (el.offsetWidth<optimal); } if (inrange && cs.maxWidth && cs.maxWidth!='none' && cs.maxWidth!='auto' && cs.maxWidth!='') { st.width= cs.maxWidth; inrange= (el.offsetWidth>optimal); } if (inrange) st.width= st.minmaxWidth; // vertical size bounding st.height= st.minmaxHeight; optimal= el.offsetHeight; inrange= true; if (inrange && cs.minHeight && cs.minHeight!='0' && cs.minHeight!='auto' && cs.minHeight!='') { st.height= cs.minHeight; inrange= (el.offsetHeight<optimal); } if (inrange && cs.maxHeight && cs.maxHeight!='none' && cs.maxHeight!='auto' && cs.maxHeight!='') { st.height= cs.maxHeight; inrange= (el.offsetHeight>optimal); } if (inrange) st.height= st.minmaxHeight; } } // Scanning. Check document every so often until it has finished loading. Do // nothing until <body> arrives, then call main init. Pass any new elements // found on each scan to be bound var minmax_SCANDELAY= 500; function minmax_scan() { var el; for (var i= 0; i<document.all.length; i++) { el= document.all[i]; if (!el.minmax_bound) { el.minmax_bound= true; minmax_bind(el); } } } var minmax_scanner; function minmax_stop() { window.clearInterval(minmax_scanner); minmax_scan(); } minmax_scan(); minmax_scanner= window.setInterval(minmax_scan, minmax_SCANDELAY); window.attachEvent('onload', minmax_stop); @end @*/ </script> <style type="text/css"> /*本例中运用到一个永远固定到页脚的footer容器,这个层是独立于主内容区的.*/ *{margin:0;padding:0;} a:link,a:visited{color:orange;font-weight:bold;} html, body, #wrapper {height: 100%;font-size:12px;} #wrapper{width:100%;background:#777;min-width:960px;} body > #wrapper {height:auto; min-height:100%;} #main {padding-bottom: 54px;}/* 必须使用和footer相同的高度,最小宽度ie6中加JS解决 */ #header{height:148px;width:100%;text-align:center;color:#fff;background:#000 url(http://images.cnblogs.com/cnblogs_com/binyong/tanxin/header-bg.png) no-repeat left top;} #inhead{height:148px;width:100%;text-align:center;color:#fff;background:url(http://www.blueidea.com/articleimg/2009/05/6692/header-bg.png) no-repeat right bottom;} h3{font-size:14px;line-height:90px;} #header p{font-size:12px;line-height:30px;} #footer { position: relative; margin-top: -54px; /* footer高度的负值 */ height: 54px;/* footer高度*/ width:100%; clear:both; background:#000; text-align:center; color:#fff; min-width:960px; } #footer p{line-height:26px;} #content{background:#999;width:80%;margin:0 auto;height:654px;} #content p{line-height:30px;padding:0 30px;color:#fff;} /*说明: 需要注意的就是#main的padding值、footer的高度和负margin值，需要保持一致。下面是著名的万能float闭合Clearfix Hack*/ .clearfix:after { content: "."; display: block; height: 0; clear: both; visibility: hidden;} .clearfix {display: inline-block;} /* Hides from IE-mac \*/ * html .clearfix { height: 1%;} .clearfix {display: block;} /* End hide from IE-mac */ </style> </head> <body> <div id="wrapper"> <div id="main" class="clearfix"> <div id="header"> <div id="inhead"> <h3>弹性流体布局</h3> <p>页头背景可平铺整个浏览器宽度，而正文内容则始终居中显示，不管分辩率是多大。</p> </div> </div> <div id="content"> <p>本页面演示了两个比较重要的技巧：最小宽度值和弹性图片.</p> <p>弹性布局是用到min-width这个属性,但这个属性在IE6下不受支持,因此加入了老外的一个JS脚本,这个脚本让IE6也能支持最小,最大宽度(高度)四个属性.</p> <p> </p> <p>弹性布局其实最难的还不是布局，而是里面的图片如何做到自适应，也就是说让图片也变得弹性起来。这是这种布局时要最优先考虑的事情。</p> <p>页头图片就是一个弹性图片的典型应用，你可以缩小一下窗口看看。</p> <p>相关文章链接：《<a href="http://www.cnblogs.com/binyong/archive/2009/05/07/1451319.html">弹性+固宽布局</a>》</p> </div> </div> </div> <div id="footer"> <p>我是浮动的始终固定在底部的DIV,无论中间的文字内容高度是否不够一屏，我还是能居底显示，</p> <p>当中间内容超过一屏时，我又可以向下浮动哟</p> </div> </body> </html> [Ctrl+A 全部选择 提示：你可先修改部分代码，再按运行]