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:26px;
	display:block;
	position:absolute;
	top:1px;
	outline:none;
}

ul#nav span {
display:none;
}

li#bthome a, li#btproducts a, li#btcontact a, li#btlocation a {background:url(graphics/navigation.gif) }

li#bthome a 						{
	background-position:0 0;
	width:115px;
	left:0;
}
li#bthome a:hover					{ background-position:0 -35px }

li#btproducts a 					{
	background-position:-115px 0;
	width:143px;
	left:115px;
}
li#btproducts a:hover				{ background-position:-115px -35px }

li#btcontact a 						{
	background-position:-258px 0;
	width:130px;
	left:258px;
}
li#btcontact a:hover				{ background-position:-258px -35px }

li#btlocation a 					{
	background-position:-388px 0;
	width:300px;
	left:388px;
}
li#btlocation a:hover				{ background-position:-388px -35px }