.button_a a{
	background: url(images/base/main_menu/button_a.gif);
	margin: 5px 10px;
	display: block;
	height: 30px;
	width: 130px;
	float: left;
}

.button_a a:hover{
	background: url(images/base/main_menu/button_a.gif) -130px;
	margin: 5px 10px;
	display: block;
	height: 30px;
	width: 130px;
	float: left;
}

.button_b a{
	background: url(images/base/main_menu/button_b.gif);
	margin: 5px 10px;
	display: block;
	height: 30px;
	width: 130px;
	float: left;
}

.button_b a:hover{
	background: url(images/base/main_menu/button_b.gif) -130px;
	margin: 5px 10px;
	display: block;
	height: 30px;
	width: 130px;
	float: left;
}

.button_c a{
	background: url(images/base/main_menu/button_c.gif);
	margin: 5px 10px;
	display: block;
	height: 30px;
	width: 130px;
	float: left;
}

.button_c a:hover{
	background: url(images/base/main_menu/button_c.gif) -130px;
	margin: 5px 10px;
	display: block;
	height: 30px;
	width: 130px;
	float: left;
}

.button_d a{
	background: url(images/base/main_menu/button_d.gif);
	margin: 5px 10px;
	display: block;
	height: 30px;
	width: 130px;
	float: left;
}

.button_d a:hover{
	background: url(images/base/main_menu/button_d.gif) -130px;
	margin: 5px 10px;
	display: block;
	height: 30px;
	width: 130px;
	float: left;
}

.button_e a{
	background: url(images/base/main_menu/button_e.gif);
	margin: 5px 10px;
	display: block;
	height: 30px;
	width: 130px;
	float: left;
}

.button_e a:hover{
	background: url(images/base/main_menu/button_e.gif) -130px;
	margin: 5px 10px;
	display: block;
	height: 30px;
	width: 130px;
	float: left;
}