@charset "utf-8";
.main_img_box a {
	width:840px;
	height:250px;
	background:url(images/main2.jpg);
	display:block;
	text-indent:-999em;
}

.main_img_box a:link,
.main_img_box a:visited {
	background-position:0px 0px;

}

.main_img_box a:active,
.main_img_box a:hover {
	background-position:0px 250px;

}