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	<title>Key4ever&#039;s 窝 &#187; 前端</title>
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		<title>HTML/CSS细节</title>
		<link>http://www.key-4ever.com/2010/10/write-the-best-html-css/</link>
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		<pubDate>Thu, 14 Oct 2010 15:47:48 +0000</pubDate>
		<dc:creator>Key4ever</dc:creator>
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			<content:encoded><![CDATA[<p>HTML/CSS的相对来说比编程简单，甚至简单很多。</p>
<p>可以用Dreamweaver快速学习上手，但最好学会手写，使用editplus/Notepad++。</p>
<p>不一定要懂最新的，例如HTML5/CSS3，但一定要懂标准的，简单的东西差别在于<strong>细节</strong>。</p>
<p><a href="http://www.key-4ever.com/wp-content/uploads/2010/10/html-css.jpg"><img class="alignnone size-full wp-image-695" title="html-css" src="http://www.key-4ever.com/wp-content/uploads/2010/10/html-css.jpg" alt="" width="534" height="99" /></a></p>
<p>以下是一些总结（持续更新）</p>
<p>编写XHTML而不是&#8221;HTML&#8221;</p>
<p>XHTML的一些特点</p>
<p>1)正确嵌套元素:&lt;p&gt;&lt;span&gt;&lt;/span&gt;&lt;/p&gt;,不能&lt;p&gt;&lt;span&gt;&lt;/p&gt;&lt;/span&gt;，span与p区交叉。</p>
<p>2)结束标签</p>
<p>3)处理空元素</p>
<p>4)区分大小写</p>
<p>5)引用的属性值</p>
<p>6)明确的属性值</p>
<p>7) 处理特殊字符&lt;!&#8211;10.14更新&#8211;&gt;</p>
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		<slash:comments>7</slash:comments>
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		<title>负边距实现超级流体布局</title>
		<link>http://www.key-4ever.com/2010/10/about-negative-margins/</link>
		<comments>http://www.key-4ever.com/2010/10/about-negative-margins/#comments</comments>
		<pubDate>Mon, 11 Oct 2010 16:32:14 +0000</pubDate>
		<dc:creator>Key4ever</dc:creator>
				<category><![CDATA[前端]]></category>
		<category><![CDATA[三栏布局]]></category>
		<category><![CDATA[流体布局]]></category>
		<category><![CDATA[负边距]]></category>

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		<description><![CDATA[负边距除了可以进行简单的hack和实现适应浏览器的垂直和水平居中外，更多会用到在流体布局里。 今晚搜索更多相关内容的时候，从这里还学到一种结构多变（左右两栏宽度固定）但排列输出不变的负边距流体布局，我简称神奇流体布局，太神奇了，练习之余总结分享一下。 如下图，无论相关区域在相关区域里怎样滚动变换位置，输出位置都不变，left、main、right区都会分别从左到右排列。 重构也有好玩的东西，好玩之余也可以想想； 这样做的优点： 结构可任意调整却不影响输出（信息量大而且用户网速慢时优先显示重要部分） 优先让搜索引擎抓取重要内容 用作高难度面试题（有必要？） 忽悠小MM 这样做的缺点： 代码不简洁，实现这样的三栏布局可用3个div解决，这里用了6个（致命） 可能增加重构难度 代码如下（我要看demo），有一个地方想不明白，#in区的负边距可用大于mian宽度但小于1400px的任何整数值。#out区的负边距则可用大于right的任何整数值，为什么呢？ &#60;!DOCTYPE html&#62; &#60;html&#62; &#60;head&#62; &#60;meta charset="utf-8"&#62; &#60;title&#62;负边距实现三栏布局&#60;/title&#62; &#60;style&#62; #wrapper{text-align:center; background:gray;} .main{background:red; margin-left:210px;} .left{float:left; width:200px; background:lime;} .right{float:right; width:250px; background:orange;} #in{float:right; width:100%; margin-left:-200px;} #in-out{margin-right:260px;} #out{float:left; margin-right:-1465px; width:100%;} &#60;/style&#62; &#60;/head&#62; &#60;body&#62; &#60;div id="wrapper"&#62; &#60;div class="right"&#62; &#60;h1&#62;我怎样都会在右边:P &#60;/h1&#62; &#60;/div&#62; &#60;div id="out"&#62; &#60;div id="in-out"&#62; &#60;div class="left"&#62; &#60;h1&#62;左边:P&#60;/h1&#62; [...]<table class="wumii-related-items" cellspacing="0" cellpadding="3" border="0"  style="clear: both;">
    
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                <font size="-1" color="#bbbbbb" style="display: block !important; font-family: arial !important; padding: 5px 0 !important; font-size: 12px !important; color: #bbb !important;">无觅</font>
            </a>
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</table>]]></description>
			<content:encoded><![CDATA[<p>负边距除了可以进行简单的hack和实现适应浏览器的<a href="http://www.google.com.hk/search?sourceid=chrome&amp;ie=UTF-8&amp;q=%E5%9E%82%E7%9B%B4%E5%92%8C%E6%B0%B4%E5%B9%B3%E5%B1%85%E4%B8%AD">垂直和水平居中</a>外，更多会用到在流体布局里。</p>
<p>今晚搜索更多相关内容的时候，从<a href="http://ued.koubei.com/?p=1225">这里</a>还学到一种结构多变（<strong>左右两栏宽度固定</strong>）但排列输出不变的负边距流体布局，我简称神奇流体布局，太神奇了，练习之余总结分享一下。</p>
<p>如下图，无论相关区域在相关区域里怎样滚动变换位置，输出位置都不变，left、main、right区都会分别从左到右排列。</p>
<p><a href="http://www.key-4ever.com/wp-content/uploads/2010/10/margin.jpg"><img class="alignnone size-full wp-image-687" title="margin" src="http://www.key-4ever.com/wp-content/uploads/2010/10/margin.jpg" alt="" width="425" height="414" /></a></p>
<p><a href="http://www.key-4ever.com/wp-content/uploads/2010/10/margin.jpg"></a>重构也有好玩的东西，好玩之余也可以想想；</p>
<p><strong>这样做的优点：</strong></p>
<ul>
<li>结构可任意调整却不影响输出（信息量大而且用户网速慢时优先显示重要部分）</li>
<li>优先让搜索引擎抓取重要内容</li>
<li>用作高难度面试题（有必要？）</li>
<li>忽悠小MM</li>
</ul>
<p><strong>这样做的缺点：</strong></p>
<ul>
<li>代码不简洁，实现这样的三栏布局可用3个div解决，这里用了6个（致命）</li>
<li>可能增加重构难度</li>
</ul>
<p><strong> </strong></p>
<p>代码如下（<a href="http://ued.koubei.com/wp-content/uploads/2010/08/negative_margin_layout.html">我要看demo</a>），有一个地方想不明白，#in区的负边距可用大于mian宽度但小于1400px的任何整数值。#out区的负边距则可用大于right的任何整数值，为什么呢？<span id="more-685"></span></p>
<pre style="background: #eee; padding: 15px;">
<div id="_mcePaste">&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
&lt;meta charset="utf-8"&gt;
&lt;title&gt;负边距实现三栏布局&lt;/title&gt;
&lt;style&gt;
#wrapper{text-align:center; background:gray;}
.main{background:red; margin-left:210px;}
.left{float:left; width:200px; background:lime;}
.right{float:right; width:250px; background:orange;}
#in{float:right;  width:100%; <strong>margin-left:-200px;</strong>}
#in-out{margin-right:260px;}
#out{float:left;  margin-right:-1465px;  width:100%;}</div>
<div id="_mcePaste">
&lt;/style&gt;
&lt;/head&gt;
&lt;body&gt;
&lt;div id="wrapper"&gt;
	&lt;div class="right"&gt;
		&lt;h1&gt;我怎样都会在右边:P &lt;/h1&gt;
	&lt;/div&gt;

	&lt;div id="out"&gt;
		&lt;div id="in-out"&gt;
		  &lt;div class="left"&gt;
		  &lt;h1&gt;左边:P&lt;/h1&gt;
		  &lt;/div&gt;

		  &lt;div id="in"&gt;
		  &lt;div class="main"&gt;
		  &lt;h1&gt;中间啊:P&lt;/h1&gt;
		  &lt;/div&gt;
		 &lt;/div&gt;
		 &lt;/div&gt;
	 &lt;/div&gt;
&lt;/div&gt;
&lt;/body&gt;
&lt;/html&gt;</div>
</pre>
<p>扩展阅读：</p>
<p><a href="http://ued.koubei.com/?p=1225">《多栏自适应布局问题浅谈》</a></p>
<p><a href="http://www.blueidea.com/tech/web/2008/6273.asp">《寻找圣杯系列》</a></p>
<p><a href="http://www.css88.com/archives/599">《一个垂直水平居中效果》</a></p>
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			<wfw:commentRss>http://www.key-4ever.com/2010/10/about-negative-margins/feed/</wfw:commentRss>
		<slash:comments>7</slash:comments>
		</item>
		<item>
		<title>用float精确定位div+css</title>
		<link>http://www.key-4ever.com/2010/01/float_in_css/</link>
		<comments>http://www.key-4ever.com/2010/01/float_in_css/#comments</comments>
		<pubDate>Sun, 31 Jan 2010 14:35:14 +0000</pubDate>
		<dc:creator>Key4ever</dc:creator>
				<category><![CDATA[前端]]></category>
		<category><![CDATA[div+css]]></category>
		<category><![CDATA[float属性]]></category>
		<category><![CDATA[页面布局]]></category>

		<guid isPermaLink="false">http://www.key-4ever.com/?p=488</guid>
		<description><![CDATA[用position的relative和absolute定位div不方便改动。用float就不折腾了，长宽定义不溢出就行了，float的详细可以看这里，里面的实例更清晰。详细代码和效果如下。 &#60;-点击看大图。 看起来每个div间都有2px距离，因为定义了边框border-width:1px，等同于div外加多一个1px，所以margin、height和width计算时像做小学计算题。以下是代码部分，两个文件放在同一文件夹就行了。 css代码部分，文件名style.css body{margin:0px auto; padding:0px; text-align:center;} #all{margin:0px auto; padding:0px; width:800px; height:800px; border-style:solid; border-width:10px; background-color:#04a2e4; } #head{margin:2px 2px 1px; padding:0px; width:794px; height:195px; border-style:solid; border-width:1px; background-color:red; } #left{margin:1px 1px 1px 2px; padding:0px; float:left; height:396px; width:395px; border-style:solid; border-width:1px; background-color:yellow; } #left1{margin:2px 2px 1px; width:389px; height:193px; border-style:solid; border-width:1px; background-color:#ffffff; } #left2{margin:1px 2px 2px; width:389px; height:193px; border-style:solid; border-width:1px; [...]<table class="wumii-related-items" cellspacing="0" cellpadding="3" border="0"  style="clear: both;">
    
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			<content:encoded><![CDATA[<p>用position的<strong>relative</strong>和<strong>absolute</strong>定位div不方便改动。用float就不折腾了，长宽定义不溢出就行了，float的详细可以<a href="http://www.w3school.com.cn/css/css_positioning_floating.asp">看这里</a>，里面的实例更清晰。详细代码和效果如下。</p>
<p><a href="http://www.key-4ever.com/wp-content/uploads/2010/01/float_css.jpg"><img class="alignnone size-medium wp-image-495" title="float_css" src="http://www.key-4ever.com/wp-content/uploads/2010/01/float_css-300x299.jpg" alt="" width="300" height="299" /></a><a href="http://www.key-4ever.com/wp-content/uploads/2010/01/css_float.jpg">&lt;-</a>点击看大图。</p>
<p>看起来每个div间都有<strong>2px</strong>距离，因为定义了边框border-width:1px，等同于div外加多一个<strong>1px</strong>，所以margin、height和width计算时像做小学计算题。以下是代码部分，两个文件放在同一文件夹就行了。</p>
<p><span id="more-488"></span></p>
<p>css代码部分，文件名style.css</p>
<pre style="background-color: #eeeeee; padding: 15px;">body{margin:0px auto;
padding:0px;
text-align:center;}
#all{margin:0px auto;
padding:0px;
width:800px;
height:800px;
border-style:solid;
border-width:10px;
background-color:#04a2e4;
}

#head{margin:2px 2px 1px;
padding:0px;
width:794px;
height:195px;
border-style:solid;
border-width:1px;
background-color:red;
}

#left{margin:1px 1px 1px 2px;
padding:0px;
float:left;
height:396px;
width:395px;
border-style:solid;
border-width:1px;
background-color:yellow;
}

#left1{margin:2px 2px 1px;
width:389px;
height:193px;
border-style:solid;
border-width:1px;
background-color:#ffffff;
}

#left2{margin:1px 2px 2px;
width:389px;
height:193px;
border-style:solid;
border-width:1px;
background-color:#ffffff;
}

#right{margin:1px 2px 1px 1px;
padding:0px;
width:395px;
height:396px;
float:left;
border-style:solid;
border-width:1px;
background-color:green;
}

#foot{margin:1px 2px 2px 2px;
padding:0px;
width:794px;
height:195px;
border-style:solid;
border-width:1px;
float:left;
background-color:#7d90e5;
}</pre>
<p>html代码部分</p>
<pre style="background-color: #eeeeee; padding: 15px;">&lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt;
&lt;html xmlns="http://www.w3.org/1999/xhtml"&gt;
&lt;head&gt;
&lt;title&gt;CSS&lt;/title&gt;
&lt;link rel="stylesheet" type="text/css" href="style.css" /&gt;
&lt;/head&gt;

&lt;body&gt;
&lt;div id="all"&gt;
&lt;div id="head"&gt;&lt;/div&gt;
&lt;div id="left"&gt;
&lt;div id="left1"&gt;&lt;/div&gt;
&lt;div id="left2"&gt;&lt;/div&gt;
&lt;/div&gt;
&lt;div id="right"&gt;&lt;/div&gt;
&lt;div id="foot"&gt;&lt;/div&gt;
&lt;/div&gt;
&lt;/body&gt;

&lt;/html&gt;</pre>
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