a.top-button {
	display:block;
	height:20px;
	background-position: left top;
}
a.share-button {
	width:116px;
	background-image:url(../images/share.gif);
}
a.join-button {
	width:143px;
	background-image:url(../images/joinemaillist.gif);
}
a.print-button {
	width:116px;
	background-image:url(../images/printthispage.gif);
}
a.search-button {
	width:48px;
	background-image:url(../images/search.gif);
}
a.top-button:hover {
	background-position: left bottom;
}