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div布局的自由伸展三栏式版面的代码_经验交流

2020-11-27 来源:华佗健康网

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<head> 
<title>自由伸展的三栏式版面</title> 
<meta name="Big John" content="August 24, 2002" /> 
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<meta name="keywords" content="demo,test,big john,big,john,positioniseverything,css,html,what else do you want from me!?" /> 
<meta name="description" content="A demo of 3 fluid, full height columns, including header and footer, all with different BGs. " /> 
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<meta name="robots" content="all" /> 
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<style type="text/css"> 
<!-- 

html {margin: 0; padding: 0;} 

body {margin: 0; padding: 0; font-family: "Palatino Linotype", Georgia, "Times New Roman", Times, serif; 
 font-size: small; background: #ee8 repeat-y url(images/browncol.gif);} 
/*** Image is 180px wide, and 20px high ***/ 

pre {margin: 0; font-family: verdana, sans-serif; font-size: .9em;} 

a {color: #000;} 

.alignright {margin-top: 0; text-align: right;} 

.small {font-size: .9em;} 

.return {position: absolute; top: 0; right: 0; text-align: right; padding: .5em;} 

/******************************************************************************* 
 Positioning rules 
*******************************************************************************/ 
h1, h2 { 
font-size: 22px; 
margin: 0; 
color: #040; 
background-color: #c83; /*** The header and footer have backgrounds, to cover the 2-tone body BG ***/ 
border-top: 4px solid #000; 
border-bottom: 5px solid #000; 
padding: 3px 0 3px 1em; 
} 

h2 {background-color: #638; color: #fff;} 

div#leftbox { /*** No side padding or borders, to avoid the IE5.x box model problem ***/ 
position: absolute; 
left: 10px; 
width: 150px; 
color: #ee8; 
padding-top: 10px; 
} 

#middlebox { 
margin: 0 34% 0 170px; 
border-left: 3px solid #000; 
border-right: 3px solid #000; 
padding: 10px; 
background-color: #dda; /*** This div has a background to cover the 2-tone body BG ***/ 
} 

div#rightbox { /*** No side padding or borders, to avoid the IE5.x box model problem ***/ 
position: absolute; 
right: 25px; /*** IE5/mac will show a horizontal scrollbar 
 if this is less than 16px, or other units are used 
 http://www.l-c-n.com/IE5tests/right_pos/ ***/ 
width: 30%; 
color: #820; 
padding-top: 10px; 
} 

--> 
</style> 
</head> 

<body> 

<h1> 
自由伸展的三栏式版面(Three Column Stretch)(页首) 
</h1> 

<div id="leftbox"> 
<pre> 
<strong>#leftbox</strong> { 
position: absolute; 
left: 10px; 
width: 180px(150px?); 
} 
</pre> 

<p> 
<strong>这个栏段</strong>的背景是利用 body 卷标设定的图片,以垂直方向重复贴上所产生的。图片的宽度和中间栏段的左边界(margin)相等,高度为20px,这样可以减少图片重复的次数,加快演算上色的速度。 
<p> 
</p> 
这一栏的内容(#leftbox)以绝对位置(absolutely positioned)的方式放在左边的区域。另外因为底层背景图片的尺寸限制,需要给定一个以像素作单位的"宽度(width)"值。 
</p> 
<p> 
<a href="#"><strong>测试用连结</strong></a> 
</p> 
</div> 

<div id="rightbox"> 
<pre> 
<strong>#rightbox</strong> { 
position: absolute; 
right: 2%; 
width: 30%; 
} 

</pre> 
<p> 
<strong>这个栏段</strong>也能显示"body"的背景,但是因为"body"的背景 
图片只在垂直方向重复,而且仅与中间栏段的左边界同宽,所以这边显示的是"body"的背景颜色(background-color)。 
这个栏段的"宽度(width)"和右边界的区域是用百分比作单位,你想用其它单位也可以。 
</p> 
<p> 
如果页面比 640px 还窄,中间和右边栏段使用的"pre"卷标会导致内容重叠。 
</p> 
<p> 
<a href="#"><strong>测试用连结</strong></a> 
</p> 

</div> 

<div id="middlebox"> 

<div> 
<a href="index.html"><strong>返回 p.i.e.</strong></a> 
</div> 

<pre> 
<strong>#middlebox</strong> { 
margin: 0 34% 0 170px; 
border-left: 2px solid #000; 
border-right: 2px solid #000; 
padding: 0 10px 10px; 
background-color: #6b9; 
} 
</pre> 
<p> 
<strong>中间栏段</strong>有设定背景色,以便跟右边栏段作区分。 
这个栏段也需要补白(padding)和边框(border),不过因为没有设定"宽度(width)"属性,并不会触发 IE5.x 的区块模块(box model)问题。 
</p> 
<p> 
这个栏段也必须是最长的栏段,并且用你支持的最大分辨率(resolution)浏览时,仍要能够延伸到检视区(viewport)底端下方,否则"body"的背景就会在页尾(footer)下方出现。 
</p> 

<p> 
<strong>这整个范例</strong>没有在任何栏段里宣告"高度(height)"属性,这是为了避掉一些浏览器表现"高度(height)"属性的独特方式。 
因为这些条件的限制,这个版面非常适合那些总是有很长的中间栏段的网页,像是 weblogs。 
</p> 
<p> 
页首、页尾和中间栏段是"固定的(static)"(或说"相对的(relative)"),而这三者一起定义了网页的尺寸。你可以帮页首和页尾指定"高度(height)"。 
</p> 
<p> 
在原始文件里,以绝对位置表示的 div#rightbox 放置在 div#leftbox 之后, 
因此这些 div 的"top"属性可以忽略。 
这会让它们待在它们该在的垂直方向起点,也就是说它们是固定的(直接连在固定的页首下)。 
所以如果页首因为额外的内容扩大,三个栏段都会往下调整,这样不是很棒吗? 
</p> 
<p> 
<strong>Mozilla 中</strong>,因为垂直方向的舍入误差(rounding error),在某些分辨率里,页尾下方可能有 1px 的空隙, 
<a href="mozshift.html">这个范例</a>描述得更详细。 
</p> 
<p> 

<strong>Nav4 中</strong>没办法使用像"div#leftbox"这类语法,所以请用"#leftbox"来代替。我的写法只是为了要明确地表示。 
</p> 
<p> 
<strong>致谢:</strong>再次感谢<a href="../../../www.l-c-n.com/default.htm">Philippe Wittenbergh</a> 
,因为他的帮忙,让这个范例更为完善。<strong>更感谢</strong> 
<a href="../../../www.mark.ac/help/default.htm">Mark Howells</a> 
,因为他提供了最初的 body 背景点子。 
</p> 
<p class="small alignright"> 
<a href="../../../users.rraz.net/mc_on_the_rocks/default.htm" 
 title=" My mountain bike site "><strong>Big John</strong></a> 

 <a href="mailto:johnthebig66@yahoo.com" title="If you've found something new and 
interesting to say about any CSS subject, please contact me. I want to know! ">e-mail</a> 
?positioniseverything
 
最后更新日期: September 6, 2002
 
Created August 24, 2002 
</p> 
<p class="small alignright"> 
<a href="../../../ccca.nctu.edu.tw/~hlb/trans/pie/thr.col.stretch.html" title="">繁体中文翻译:</a><strong>yyhuang</strong>
 
简体中文转换:
 
<a href="../../../www.onestab.net/default.htm"><strong>onestab</strong></a> 

 
<p> 
<strong>以下是填满栏段用的</strong>

 
Why don't cannibals eat clowns?
 
Answer: They taste funny.

 
What is the difference between a lousy golfer and a lousy skydiver?
 

Answer: A lousy golfer goes WHAP! "Oh crap!". A lousy skydiver goes "Oh crap!" WHAP!

 
Did you hear about the geneticist that tried to cross a potato and a chicken?
 
He wanted to produce a chicken that would definitely NOT cross the road, but instead, 
got a bunch of potatoes that sat around pecking eachother's eyes out.

 
How many Psychiatrists does it take to change a light bulb?
 
Answer: Only one, but the bulb has to really <em>want</em> to change.

 
Why did the egg cross the road?
 
Answer: It had an inclination. 
</p> 

</div> 

<h2> 
自由伸展的三栏式版面(Three Column Stretch)(页尾) 
</h2> 

</body> 
</html>
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