if (roll == 'true'){
// cache buttons
a1 = new Image();
a1.src="../images/menu/u_contact_us.gif";
a2 = new Image();
a2.src="../images/menu/s_contact_us.gif";
b1 = new Image();
b1.src="../images/menu/u_catering.gif";
b2 = new Image();
b2.src="../images/menu/s_catering.gif";
c1 = new Image();
c1.src="../images/menu/u_gift_baskets.gif";
c2 = new Image();
c2.src="../images/menu/s_gift_baskets.gif";
d1 = new Image();
d1.src="../images/menu/u_our_history.gif";
d2 = new Image();
d2.src="../images/menu/s_our_history.gif";
e1 = new Image();
e1.src="../images/menu/u_home.gif";
e2 = new Image();
e2.src="../images/menu/s_home.gif";
}