ht;width:420px;} #footer{width:700px;margin-right:auto;margin-left:auto;overflow:auto;clear:both;}
单行三列 绝对定位
Example Source Code [www.devdao.com] #left{position:absolute;top:0px;left:0px;width:120px;} #middle{margin:0px190px0px190px;} #right{position:absolute;top:0px;right:0px;width:120px;}
float定位一 xhtml代码:
Example Source Code [www.devdao.com] <div id="wrap"> <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>/*用法web标准不建议,但是记住下面元素需要清除浮动*/ </div> <divid="column3">这里是第三列</div> <divclass="clear"></div>/*用法web标准不建议,但是记住下面元素需要清除浮动*/ </div>
CSS代码:
Example Source Code [www.devdao.com] #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;}
float定位二 xhtml代码:
Example Source Code [www.devdao.com] <div id="center"class="column"> <h1>Thisisthemaincontent.</h1> </div> <div id="left"class="column"> <h2>Thisistheleftsidebar.</h2> </div> <div id="right"class="column"> <h2>Thisistherightsidebar.</h2> </div>
CSS代码:
Example Source Code [www.devdao.com] body{ margin:0; padding-left:200px;/*LCfullwidth*/ padding-right:190px;/*RCfullwidth CCpadding*/ min-width:200px;/*LCfullwidth CCpadding*/ } .column{ position:relative; float:left; } #center{ width:100; } #left{ width:200px;/*LCwidth*/ right:200px;/*LCfullwidth*/ margin-left:-100; } #right{ width:190px;/*RCwidth*/ margin-right:-100; }
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