#header{background:url(../images/nav_bg.jpg) no-repeat;margin:4px auto;height:37px}
.mainnav{margin:0;font-size:14px}
.mainnav ul{margin:0 0 0 200px}
.mainnav li{list-style:none;float:left;text-align:center}
.mainnav a.headeron{background:url(../images/nav_on.jpg) no-repeat;float:left;display:block;text-decoration:none;width:89px;height:37px;line-height:37px;color:#fff}
.mainnav a.headerout{background:url(../images/nav_out.jpg) no-repeat;float:left;display:block;text-decoration:none;width:89px;height:37px;line-height:37px;color:#011817}
.mainnav li a:hover{color:#4fc3c4}