home_up = new Image();
	   home_up.src = "buttons/home_up.gif";
	   home_down = new Image();
	   home_down.src = "buttons/home_down.gif";
	   mission_up = new Image();
	   mission_up.src = "buttons/mission_up.gif";
	   mission_down = new Image();
	   mission_down.src = "buttons/mission_down.gif";
	   edu_up = new Image();
	   edu_up.src = "buttons/edu_up.gif";
	   edu_down = new Image();
	   edu_down.src = "buttons/edu_down.gif";
	   cal_up = new Image();
	   cal_up.src = "buttons/cal_up.gif";
	   cal_down = new Image();
	   cal_down.src = "buttons/cal_down.gif";
	   rent_up = new Image();
	   rent_up.src = "buttons/rent_up.gif";
	   rent_down = new Image();
	   rent_down.src = "buttons/rent_down.gif";
	   ret_up = new Image();
	   ret_up.src = "buttons/ret_up.gif";
	   ret_down = new Image();
	   ret_down.src = "buttons/ret_down.gif";
	   trail_up = new Image();
	   trail_up.src = "buttons/trail_up.gif";
	   trail_down = new Image();
	   trail_down.src = "buttons/trail_down.gif";
	   build_up = new Image();
	   build_up.src = "buttons/build_up.gif";
	   build_down = new Image();
	   build_down.src = "buttons/build_down.gif";
	   food_up = new Image();
	   food_up.src = "buttons/food_up.gif";
	   food_down = new Image();
	   food_down.src = "buttons/food_down.gif";
	   teach_up = new Image();
	   teach_up.src = "buttons/teach_up.gif";
	   teach_down = new Image();
	   teach_down.src = "buttons/teach_down.gif";
	   kid_up = new Image();
	   kid_up.src = "buttons/kid_up.gif";
	   kid_down = new Image();
	   kid_down.src = "buttons/kid_down.gif";
	   scc_up = new Image();
	   scc_up.src = "buttons/scc_up.gif";
	   scc_down = new Image();
	   scc_down.src = "buttons/scc_down.gif";
	   links_up = new Image();
	   links_up.src = "buttons/link_up.gif";
	   links_down = new Image();
	   links_down.src = "buttons/link_down.gif";
	   store_up = new Image();
	   store_up.src = "buttons/store_up.gif";
	   store_down = new Image();
	   store_down.src = "buttons/store_down.gif";
	   sust_up = new Image();
	   sust_up.src = "buttons/sust_up.gif";
	   sust_down = new Image();
	   sust_down.src = "buttons/sust_down.gif";
	   function overIt(t){
	      document[t].src=eval(t + "_down.src");
	   }
	   function notOverIt(r){
	      document[r].src=eval(r + "_up.src");
	   }