.content{width:950px;margin:1px auto 0 auto;padding:0;background:#fff;}
#nav{font-size:14px;position:relative;z-index:100;background:url(/images/Common/navstudyez.gif) no-repeat left top; width:950px;height:33px;margin:0 auto;}   
#nav ul{list-style:none;}  
.daohanglink{margin-left:10px;width:940px;}
.mainNav a:hover{background:url(/images/Common/navhover.gif) repeat-x left top;}
#nav li {float:left;position:relative;}    
#nav ul ul {visibility:hidden;position:absolute;left:3px;top:32px; background:#2a7dc3; padding-top:5px;}    
#nav table {position:absolute; top:0px; left:0px; }    
#nav ul li:hover ul,#nav ul a:hover ul{visibility:visible;}    
#nav a{display:block; padding:2px 12px;color:#fff;text-decoration:none;}    
#nav a:hover{color:#f40; border:0px #666 solid;}/*这里的border是兼容IE6有效*/    
#nav ul ul li {clear:both; text-align:left; font-size:12px;line-height:20px;}    
#nav ul ul li a{display:block; margin:0;  font-weight:normal; width:110px;color:#fff;}
#nav ul ul li a:hover{background:#e0f2ff; border:none;color:#fff;}  
.mainNav{ text-decoration:none; font-weight:bold; font-size:14px; padding:4px 9px 0px 0px;*padding-top:5px;_padding-top:5px; }