var offers_link_porsche_on = new Image;
offers_link_porsche_on.src = '/images/offers_link_porsche_on.gif';

var offers_link_porsche_off = new Image;
offers_link_porsche_off.src = '/images/offers_link_porsche_off.gif';

var offers_link_audi_on = new Image;
offers_link_audi_on.src = '/images/offers_link_audi_on.gif';
var offers_link_audi_off = new Image;
offers_link_audi_off.src = '/images/offers_link_audi_off.gif';


function changeImage(imgName, mode){
		document[imgName].src = eval(imgName + "_" + mode + ".src");
}