.ii_nav{ float:right; width:686px; position:relative;}
.t_nav .tn_bg{ position:absolute; background:url(images/i_nav2_bg.jpg) no-repeat center center; width:95px; height:83px; top:4px; left:0px; z-index:3;}
.t_nav .tn_c{ position: absolute; width:686px; height:77px; z-index:5; left:1px; top:6px; _top:-80px;}
.t_nav .tn_c a{ display:block; float:left; width:88px; height:77px; margin-left:10px; text-decoration:none;}
.t_nav .tn_c .nav1{ background:url(images/nav1.jpg) no-repeat center center; margin-left:0px;}
.t_nav .tn_c .nav2{ background:url(images/nav2.jpg) no-repeat center center;}
.t_nav .tn_c .nav3{ background:url(images/nav3.jpg) no-repeat center center;}
.t_nav .tn_c .nav4{ background:url(images/nav4.jpg) no-repeat center center;}
.t_nav .tn_c .nav5{ background:url(images/nav5.jpg) no-repeat center center;}
.t_nav .tn_c .nav6{ background:url(images/nav6.jpg) no-repeat center center;}
.t_nav .tn_c .nav7{ background:url(images/nav7.jpg) no-repeat center center;}
.t_nav{ width:100%; background:url(images/itop_bg2.jpg) repeat-x top; height:121px; position:fixed; top:35px; right:0px; z-index:999; overflow:hidden;}
.t_nav1{ height:98px;}
.i_nav{ height:92px; width:1000px; margin:0px auto; }