html,body{height:100%; width:100%; overflow:hidden; margin:0; padding:0;}
#container {text-align: left;}  
#top {height: 41px;background-color: #242424;}  
#middle {height: 240px;}  
#middle_left {height:740px;width: 240px;float: left;background-color: #333;_margin-right:-3px;}  
#middle_right {height:240px;width: 220px;float: right;background-color: #ddd;_margin-left:-3px;}  
/* 自适应宽度的 div：1.不要设置 width,即 width:auto ，2.不要设置 float,即 float:none，3.其div的位置应放在最后，比 float='right' 的 div 还靠后*/  
#middle_center {}  
#foot {height: 120px;background-color: teal;}  
.clearDiv {clear:both;}
html *{
		padding:0;
		margin:0;
		font-family: Arial, Verdana, Helvetica, sans-serif;
	}
		#li_u{border-left:none; }
	.nav{margin-top:200px;}
	.nav *{
		text-decoration:none;
		font-size:9pt;
		
	}
	.nav * a:hover{
		background-color:#82ce18;/* 鼠标经过时的红色背景，可自定义 */
	}
	.menu{
		list-style:none;
		height:40px;
		width:100%;
		background-color:#333;
		margin-top:0;
	}
	.nav{
		list-style:none;
		height:40px;		
		margin:0;
		float:right;
		margin-right:0px;
		background-color:#333;		
	}
	.nav li{
		float:left;
		border-left:1px solid #4a4a4a;
		border-right:1px solid #242424;
		border-top:1px solid #4a4a4a;
		border-bottom:1px solid #242424;
		position:relative;
	}
	.nav li a{
		color:#fff;
		height:38px;
		line-height:38px;
		font-weight:bold;
		padding:0 20px;
		blr:expression(this.onFocus=this.close());
		blr:expression(this.onFocus=this.blur());
		display:inline-block;
	}
	.nav li a:focus{ 
		-moz-outline-style: none; 
	}
	.nav li .sub-nav{
		position:absolute;
		top:39px;
		left:-1px;
		list-style:none;
		background-color:#333;
		display:none;
	}
	.nav li .sub-nav li{
		text-align:center;
		clear:left;
		width:140px;
		height:35px;
		line-height:35px;
		position:relative;
	}
	.nav li .sub-nav li a{
		height:34px;
		line-height:34px;
		width:138px;
		padding:0;
		display:inline-block;
	}
	.logo{position:absolute; left:0px; top:0px; width:300px; height:39px; background-image:url(../images/logo.gif); background-repeat:no-repeat;}
	.user{width:200px; height:39px; color:#fff; font-size:14px;line-height:39px;};