#sub-index a {
	background-image:url(img/sub_index.gif);
}
#sub-president-msg a {
	background-image:url(img/sub_president-msg.gif);
}
#sub-education a {
	background-image:url(img/sub_education.gif);
}
#sub-musician-course a {
	background-image:url(img/sub_musician-course.gif);
}
#sub-research-course a {
	background-image:url(img/sub_research-course.gif);
}
#p-index #sub-index a, #p-president-msg #sub-president-msg a, #p-education #sub-education a , #p-musician-course #sub-musician-course a , #p-research-course #sub-research-course a {
	background-position:-240px top;
}