ul#nav { background:url(graphics/navigation.gif); position:relative; margin:0; }
ul#nav li { float:left; list-style-type:none; }
ul#nav li a { height:36px; display:block; position:absolute; top:0; outline:none; }

ul#nav span {
display:none;
}

li#bthome a, li#btused_cars a, li#btwarranty a, li#btfaq a, li#btcontact a {background:url(graphics/navigation.gif) }

li#bthome a 						{ background-position:0 0; width:283px; left:0 }
li#bthome a:hover					{ background-position:0 -36px }

li#btused_cars a 					{ background-position:-184px 0; width:209px; left:184px }
li#btused_cars a:hover				{ background-position:-184px -36px }

li#btwarranty a 					{ background-position:-392px 0; width:185px; left:392px }
li#btwarranty a:hover				{ background-position:-392px -36px }

li#btcontact a 						{ background-position:-578px 0; width:221px; left:578px }
li#btcontact a:hover				{ background-position:-578px -36px }