/* 无刷新切换1 */
#bigbox { float:left;width:390px;}
#bigbox menubox{ float:left;width:390px;height:25px;margin:0 auto;}
#bigbox li{ float:left;margin:0 auto;width:76px; height:25px;background:url(pic/nav_menu_b.gif) top no-repeat; text-align:center;list-style:none; color:#000;line-height:23px; overflow:hidden; }
#bigbox li span{ float:left; width:76px; height:25px; line-height:21px; padding-top:5px; cursor:pointer;}
#bigbox li a{ color:#ffffff; text-decoration:none;}
#bigbox li a:visited{ color:#ffffff; text-decoration:none;}
#bigbox li a:active{ color:#ffffff; text-decoration:none;}
#bigbox li a:hover{ display:block;color:#ff0000;width:76px; height:25px; background:url(pic/nav_menu_a.gif) top no-repeat;}

.atli{ font-weight:bold;background:url(pic/nav_menu_a.gif) top no-repeat!important; width:76px; height:25px}
.atspan{color:#000000;}
.content_box{ float:left;}

/* 无刷新切换2 */
#bigbox2 { float:left;width:490px;}
#bigbox2 menubox2{ float:left;width:490px;height:25px;margin:0 auto;}
#bigbox2 li{ float:left;margin:0 auto;width:76px; height:25px;background:url(pic/nav_menu_b.gif) top no-repeat; text-align:center;list-style:none; color:#000;line-height:23px; overflow:hidden; }
#bigbox2 li span{ float:left; width:76px; height:25px; line-height:21px; padding-top:5px; cursor:pointer;}
#bigbox2 li a{ color:#ffffff; text-decoration:none;}
#bigbox2 li a:visited{ color:#ffffff; text-decoration:none;}
#bigbox2 li a:active{ color:#ffffff; text-decoration:none;}
#bigbox2 li a:hover{ display:block;color:#ff0000;width:76px; height:25px; background:url(pic/nav_menu_a.gif) top no-repeat;}
/* 无刷新切换3 */
#bigbox3 { float:left;width:490px;}
#bigbox3 menubox3{ float:left;width:490px;height:25px;margin:0 auto;}
#bigbox3 li{ float:left;margin:0 auto;width:76px; height:25px;background:url(pic/nav_menu_b.gif) top no-repeat; text-align:center;list-style:none; color:#000;line-height:23px; overflow:hidden; }
#bigbox3 li span{ float:left; width:76px; height:25px; line-height:21px; padding-top:5px; cursor:pointer;}
#bigbox3 li a{ color:#ffffff; text-decoration:none;}
#bigbox3 li a:visited{ color:#ffffff; text-decoration:none;}
#bigbox3 li a:active{ color:#ffffff; text-decoration:none;}
#bigbox3 li a:hover{ display:block;color:#ff0000;width:76px; height:25px; background:url(pic/nav_menu_a.gif) top no-repeat;}

/* 无刷新切换4 */
#bigbox4 { float:left;width:250px;}
#bigbox4 menubox4{ float:left;width:250px;height:22px;margin:0 auto;}
#bigbox4 li{ float:left;margin:0 auto;width:40px; height:22px;border-right:1px #969ba3 solid;background:url(pic/.gif) top no-repeat; text-align:center;list-style:none; color:#000;line-height:23px; overflow:hidden; }
#bigbox4 li span{ float:left; width:40px; height:22px; line-height:21px; padding-top:1px; cursor:pointer;}
#bigbox4 li a{ color:blue; text-decoration:none;}
#bigbox4 li a:visited{ color:blue; text-decoration:none;}
#bigbox4 li a:active{ color:#blue; text-decoration:none;}
#bigbox4 li a:hover{ display:block;color:#ff0000;width:40px; height:22px; background:url(pic/.gif) top no-repeat;}

.atli4{ font-weight:bold;background:url(pic/.gif) top no-repeat!important; width:40px; height:22px}
.atspan4{color:red;}