var model_cadillac_on=new Image();
model_cadillac_on.src="/img/interface/btn_cadillac_a.jpg";
var model_cadillac_off=new Image();
model_cadillac_off.src="/img/interface/btn_cadillac.jpg";

var model_saab_on=new Image();
model_saab_on.src="/img/interface/btn_saab_a.jpg";
var model_saab_off=new Image();
model_saab_off.src="/img/interface/btn_saab.jpg";

var model_hummer_on=new Image();
model_hummer_on.src="/img/interface/btn_hummer_a.jpg";
var model_hummer_off=new Image();
model_hummer_off.src="/img/interface/btn_hummer.jpg";

var model_chevrolet_on=new Image();
model_chevrolet_on.src="/img/interface/btn_chevrolet_a.jpg";
var model_chevrolet_off=new Image();
model_chevrolet_off.src="/img/interface/btn_chevrolet.jpg";