#navigation ul#row4 a.mail {
	width:145px;
	height:145px;
	display:block;
	background: url(../gfx/mail.gif) 0 0;
}

#navigation ul#row4 a.mail:hover {
	width:145px;
	height:145px;
	display:block;
	background: url(../gfx/mail.gif) -145px 0;
}