#nav { height: 35px; background: url(../images/nav.jpg) }
#nav ul { padding: 0; margin: 0; }
#nav ul li { float: left; }
#nav ul li a.nav01 { width: 257px; height: 35px; display: block; }
#nav ul li a.nav01:hover { background: url(../images/nav-ov.jpg); }
#nav ul li a.cur01 { width: 257px; height: 35px; display: block; background: url(../images/nav-ov.jpg); }

#nav ul li a.nav02 { width: 257px; height: 35px; display: block; }
#nav ul li a.nav02:hover { background: url(../images/nav-ov.jpg) -257px; }
#nav ul li a.cur02 { width: 257px; height: 35px; display: block; background: url(../images/nav-ov.jpg); }

#nav ul li a.nav03 { width: 282px; height: 35px; display: block; }
#nav ul li a.nav03:hover { background: url(../images/nav-ov.jpg) -514px; }
#nav ul li a.cur03 { width: 282px; height: 35px; display: block; background: url(../images/nav-ov.jpg); }

#nav ul li a.nav04 { width: 164px; height: 35px; display: block; }
#nav ul li a.nav04:hover { background: url(../images/nav-ov.jpg) -796px; }
#nav ul li a.cur04 { width: 164px; height: 35px; display: block; background: url(../images/nav-ov.jpg); }