div+css的几种常用的布局

body { margin: 0px;   padding: 0px;  text-align: center;  }
#content {  margin-left:auto;  margin-right:auto;  width: 400px;  }

body {  margin: 0px;   padding: 0px;   text-align: center;}
#content-top { margin-left:auto;   margin-right:auto; width: 400px;  }
#content-end {margin-left:auto; margin-right:auto;  width: 400px;   }

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;   }
#content-end { margin-left:auto; margin-right:auto; width: 400px;   }

#bodycenter { width: 700px;margin-right: auto; margin-left: auto;overflow: auto;  }
#bodycenter #dv1 {float: left;width: 280px;}
#bodycenter #dv2 {float: right;width: 420px;}

#header{    width: 700px; margin-right: auto;margin-left: auto; overflow: auto;}
#bodycenter { width: 700px; margin-right: auto; margin-left: auto; overflow: auto; }
#bodycenter #dv1 { float: left; width: 280px;}
#bodycenter #dv2 { float: right;width: 420px;}

#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: 420px;}
#footer{     width: 700px;  margin-right: auto; margin-left: auto;  overflow: auto; clear:both; }

#left { position: absolute; top: 0px;  left: 0px; width: 120px;  }
#middle {margin: 0px 190px 0px 190px; }
#right {position: absolute;top: 0px; right: 0px;  width: 120px;}

<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>
<div id="column3">这里是第三列</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>

#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;}

<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>

body {
margin: 0;
padding-left: 200px;    /* LC fullwidth */
padding-right: 190px;   /* RC fullwidth + CC padding */
min-width: 200px;       /* LC fullwidth + CC padding */
}
.column {
position: relative;
float: left;
}
#center {
width: 100%;
}
#left {
width: 200px;           /* LC width */
right: 200px;           /* LC fullwidth */
margin-left: -100%;
}
#right {
width: 190px;           /* RC width */
margin-right: -100%;
}
/*** IE Fix ***/
* html #left {
left: 190px;            /* RC fullwidth */
}

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