.home {background-image: url(../images/home_rollover.jpg); width: 160px;}
.home a {background-image: url(../images/home.jpg); width: 160px;}
.products a {background-image: url(../images/products.jpg); width: 210px;}
.products {background-image: url(../images/products_rollover.jpg);}
.services a {background-image: url(../images/services_rollover.jpg); width: 210px;}
.services {background-image: url(../images/services_rollover.jpg);}
.contact a {background-image: url(../images/contact.jpg); width: 180px;}
.contact {background-image: url(../images/contact_rollover.jpg);}