.btn ul {
	padding:0;
 	margin:0;
	list-style: none;
	display: block;
	/*text-indent: -9999px;*/
	float:left;
}

.btn li {
	list-style:none;
	float:left;
}

.btn span {
	display: none;
}

.btn a:link {
	background-position: 0px 0px;
}

.btn a:visited {
	background-position: 0px -30px;
}

.btn a:hover {
	background-position: 0px -60px;
}

.btn a:active {
	background-position: 0px -90px;
}

.btn_home a {
	width: 150px;
	height: 30px;
	background-image: url(images/btn_home.jpg);
	background-repeat: no-repeat;
	display: block;
}

.btn_why a {
	width: 150px;
	height: 30px;
	background-image: url(images/btn_why.jpg);
	background-repeat: no-repeat;
	display: block;
}

.btn_about a {
	width: 150px;
	height: 30px;
	background-image: url(images/btn_about.jpg);
	background-repeat: no-repeat;
	display: block;
}

.btn_detail a {
	width: 150px;
	height: 30px;
	background-image: url(images/btn_detail.jpg);
	background-repeat: no-repeat;
	display: block;
}

.btn_voice a {
	width: 150px;
	height: 30px;
	background-image: url(images/btn_voice.jpg);
	background-repeat: no-repeat;
	display: block;
}

.btn_contact a {
	width: 150px;
	height: 30px;
	background-image: url(images/btn_contact.jpg);
	background-repeat: no-repeat;
	display: block;
}