#nav {margin: 0; padding: 0; width: 870px; height: 42px; background: url(back_nav1.gif) no-repeat; overflow: hidden; position: absolute; top: 37px; left: 0;}
#nav li {margin: 0; padding: 0; list-style: none; display: block; position: absolute;}
#nav a {display: block;}
#nav span {display: none;}
#btn1, #btn1 a, #btn2, #btn2 a, #btn3, #btn3 a, #btn5, #btn5 a, #btn4, #btn4 a, #btn6, #btn6 a {height: 42px; top: 0; background: url(back_nav1.gif) no-repeat;}
#btn1 {left: 312px; width: 111px;}
#btn2 {left: 423px; width: 97px;}
#btn3 {left: 520px; width: 71px;}
#btn4 {left: 591px; width: 72px;}
#btn5 {left: 663px; width: 112px;}
#btn6 {left: 775px; width: 80px;}
#btn1, #btn1 a {background-position: -312px 0;}
#btn2, #btn2 a {background-position: -423px 0;}
#btn3, #btn3 a {background-position: -520px 0;}
#btn4, #btn4 a {background-position: -591px 0;}
#btn5, #btn5 a {background-position: -663px 0;}
#btn6, #btn6 a {background-position: -775px 0;}
#btn1 a:hover {background-position: -312px -42px;}
#btn2 a:hover {background-position: -423px -42px;}
#btn3 a:hover {background-position: -520px -42px;}
#btn4 a:hover {background-position: -591px -42px;}
#btn5 a:hover {background-position: -663px -42px;}
#btn6 a:hover {background-position: -775px -42px;}
#btn1 a.active {background-position: -312px -84px;}
#btn2 a.active {background-position: -423px -84px;}
#btn3 a.active {background-position: -520px -84px;}
#btn4 a.active {background-position: -591px -84px;}
#btn5 a.active {background-position: -663px -84px;}
#btn6 a.active {background-position: -775px -84px;}
BODY.section-btn1 #btn1 A {BACKGROUND-POSITION: -312px -84px}
BODY.section-btn2 #btn2 A {BACKGROUND-POSITION: -423px -84px}
BODY.section-btn3 #btn3 A {BACKGROUND-POSITION: -520px -84px}
BODY.section-btn4 #btn4 A {BACKGROUND-POSITION: -591px -84px}
BODY.section-btn5 #btn5 A {BACKGROUND-POSITION: -663px -84px}
BODY.section-btn6 #btn6 A {BACKGROUND-POSITION: -775px -84px}