body{font-size:12px;}
    ul,li{list-style-type:none;padding:0;margin:0;}
    .main_nav{padding-top:2px;}
    .main_nav a{display:block;line-height:25px;height:25px;padding-left:5px;padding-right:5px;overflow:hidden;}
    .main_nav .navs{width:90px;height:25px;float:left;margin-right:2px;}
    *html .main_nav .navs{overflow:hidden;} /* only for ie6 */
    .main_nav .navs .nav_a{color:#fff;text-decoration:none;font-weight:bold;}
    .main_nav .navs .nav_a:hover{background:#015EBD;}
    .sub_nav{display:none;width:90px;position:relative;z-index:1000;opacity:0.9;filter:Alpha(opacity=90);}
    .sub_nav li a {color:#000000;text-decoration:none; }
    .sub_nav li a:link, .sub_nav li a:visited{background:#BEE9FD;}
    .sub_nav li a:hover{color:#FFFFFF;background:#0077BB;}
    .clear{clear:both;height:1px;line-height:1px;font-size:1px;}