#mainmenu  { width: 680px; height: 80px }
.menu01 { background-image: url("../img/main_btn01.gif"); background-repeat: no-repeat; text-indent: -7777px; display: block; width: 170px; height: 80px; float: left }
.menu01 a  { text-decoration: none; background-image: url("../img/main_btn01.gif"); background-repeat: no-repeat; text-indent: -7777px; display: block; width: 170px; height: 80px; float: left }
.menu01 a:hover  { text-decoration: none; background-image: url("../img/main_btn01.gif"); background-repeat: no-repeat; background-position: -170px 0; text-indent: -7777px; display: block; width: 170px; height: 80px; float: left }
.menu02 { background-image: url("../img/main_btn02.gif"); background-repeat: no-repeat; text-indent: -7777px; display: block; width: 170px; height: 80px; float: left }
.menu02 a  { text-decoration: none; background-image: url("../img/main_btn02.gif"); background-repeat: no-repeat; text-indent: -7777px; display: block; width: 170px; height: 80px; float: left }
.menu02 a:hover  { text-decoration: none; background-image: url("../img/main_btn02.gif"); background-repeat: no-repeat; background-position: -170px 0; text-indent: -7777px; display: block; width: 170px; height: 80px; float: left }
.menu03 { background-image: url("../img/main_btn03.gif"); background-repeat: no-repeat; text-indent: -7777px; display: block; width: 170px; height: 80px; float: left }
.menu03 a  { text-decoration: none; background-image: url("../img/main_btn03.gif"); background-repeat: no-repeat; text-indent: -7777px; display: block; width: 170px; height: 80px; float: left }
.menu03 a:hover  { text-decoration: none; background-image: url("../img/main_btn03.gif"); background-repeat: no-repeat; background-position: -170px 0; text-indent: -7777px; display: block; width: 170px; height: 80px; float: left }
.menu04 { background-image: url("../img/main_btn04.gif"); background-repeat: no-repeat; text-indent: -7777px; display: block; width: 170px; height: 80px; float: left }
.menu04 a  { text-decoration: none; background-image: url("../img/main_btn04.gif"); background-repeat: no-repeat; text-indent: -7777px; display: block; width: 170px; height: 80px; float: left }
.menu04 a:hover  { text-decoration: none; background-image: url("../img/main_btn04.gif"); background-repeat: no-repeat; background-position: -170px 0; text-indent: -7777px; display: block; width: 170px; height: 80px; float: left }