单行一列以下是引用片段：body { margin: 0px; padding: 0px; text-align: center; } #content { margin-left:auto; margin-right:auto; width: 400px; width: 370px; } 两行一列以下是引用片段：body { margin: 0px; padding: 0px; text-align: center;} #content-top { margin-left:auto; margin-right:auto; width: 400px; width: 370px;} #content-end {margin-left:auto; margin-right:auto; width: 400px; width: 370px;}三行一列以下是引用片段：body { margin: 0px; padding: 0px; text-align: center; } #content-top { margin-left:auto; margin-right:auto; width: 400px; width: 370px; } #content-mid { margin-left:auto; margin-right:auto; width: 400px; width: 370px; } #content-end { margin-left:auto; margin-right:auto; width: 400px; width: 370px; } 单行两列以下是引用片段：#bodycenter { width: 700px;margin-right: auto; margin-left: auto;overflow: auto; } #bodycenter #dv1 {float: left;width: 280px;} #bodycenter #dv2 {float: right;width: 410px;} 两行两列以下是引用片段：#header{ width: 700px; margin-right: auto;margin-left: auto; overflow: auto;} #bodycenter { width: 700px; margin-right: auto; margin-left: auto; overflow: auto; } Webjx.Com #bodycenter #dv1 { float: left; width: 280px;} #bodycenter #dv2 { float: right;width: 410px;}三行两列以下是引用片段：#header{ width: 700px;margin-right: auto; margin-left: auto; } #bodycenter {width: 700px; margin-right: auto; margin-left: auto; } #bodycenter #dv1 { float: left;width: 280px;} #bodycenter #dv2 { float: right; width: 410px;} #footer{ width: 700px; margin-right: auto; margin-left: auto; overflow: auto; } 单行三列 绝对定位以下是引用片段：#left { position: absolute; top: 0px; left: 0px; width: 120px; } #middle {margin: 20px 190px 20px 190px; } #right {position: absolute;top: 0px; right: 0px; width: 120px;} float定位一xhtml: 以下是引用片段：<div id="warp"> <div id="column"> <div id="column1">这里是第一列</div> <div id="column2">这里是第二列</div> <div class="clear"></div> </div> <div id="column3">这里是第三列</div> <div class="clear"></div> </div> CSS: 以下是引用片段：#wrap{ width:100%; height:auto;} 网页教学网 #column{ float:left; width:60%;} #column1{ float:left; width:30%;} #column2{ float:right; width:30%;} #column3{ float:right; width:40%;} .clear{ clear:both;} float定位二xhtml:以下是引用片段：<div id="center" class="column"> <h1>This is the main content.</h1> </div> <div id="left" class="column"> <h2>This is the left sidebar.</h2> </div> <div id="right" class="column"> <h2>This is the right sidebar.</h2> </div> CSS: 网页教学网 以下是引用片段：body {margin: 0;padding-left: 200px;padding-right: 190px;min-width: 240px;} .column {position: relative;float: left;} #center {width: 100%;} #left {width: 180px; right: 240px;margin-left: -100%;} #right {width: 130px;margin-right: -100%;} 两行三列xhtml:以下是引用片段：<div id="header">这里是顶行</div> <div id="warp"> <div id="column"> <div id="column1">这里是第一列</div> <div id="column2">这里是第二列</div> <div class="clear"></div> </div> <div id="column3">这里是第三列</div> <div class="clear"></div> </div> CSS: 以下是引用片段：#header{width:100%; height:auto;} #wrap{ width:100%; height:auto;} #column{ float:left; width:60%;} #column1{ float:left; width:30%;} #column2{ float:right; width:30%;} #column3{ float:right; width:40%;} .clear{ clear:both;} 三行三列 xhtml:以下是引用片段：<div id="header">这里是顶行</div> <div id="warp"> <div id="column"> <div id="column1">这里是第一列</div> <div id="column2">这里是第二列</div> <div class="clear"></div> </div> <div id="column3">这里是第三列</div> <div class="clear"></div> </div> <div id="footer">这里是底部一行</div> CSS:以下是引用片段：#header{width:100%; height:auto;} #wrap{ width:100%; height:auto;} #column{ float:left; width:60%;} #column1{ float:left; width:30%;} #column2{ float:right; width:30%;} #column3{ float:right; width:40%;} .clear{ clear:both;} #footer{width:100%; height:auto;} PS:这里列出的是常用的例子，而非研究之用，对一每个盒子，都没有设置margin,padding,boeder等属性！
网页教学网
