#a a {
	background-image: url("images/icon_a_on.gif");
}

#b a {
	background-image: url("images/icon_b.gif");
}

#c a {
	background-image: url("images/icon_c.gif");
}

#a a:hover {
	background-image: url("images/icon_a.gif");
}

#b a:hover {
	background-image: url("images/icon_b_on.gif");
}

#c a:hover {
	background-image: url("images/icon_c_on.gif");
}

#footer {
	float: left;
	width: 620px;
	height: 120px;
	background: url("images/bg_a.gif") no-repeat;
}