navhomeon = new Image();
navhomeon.src = "images/nav/home_on.gif";
navhomeoff = new Image();
navhomeoff.src = "images/nav/home_off.gif";

musicon = new Image();
musicon.src = "images/music_on.gif";
musicoff = new Image();
musicoff.src = "images/music_off.gif";

navmusicon = new Image();
navmusicon.src = "images/nav/music_on.gif";
navmusicoff = new Image();
navmusicoff.src = "images/nav/music_off.gif";

foodon = new Image();
foodon.src = "images/food_on.gif";
foodoff = new Image();
foodoff.src = "images/food_off.gif";

navfoodon = new Image();
navfoodon.src = "images/nav/food_on.gif";
navfoodoff = new Image();
navfoodoff.src = "images/nav/food_off.gif";

activitieson = new Image();
activitieson.src = "images/activities_on.gif";
activitiesoff = new Image();
activitiesoff.src = "images/activities_off.gif";

navactivitieson = new Image();
navactivitieson.src = "images/nav/activities_on.gif";
navactivitiesoff = new Image();
navactivitiesoff.src = "images/nav/activities_off.gif";

navphotoson = new Image();
navphotoson.src = "images/nav/photos_on.gif";
navphotosoff = new Image();
navphotosoff.src = "images/nav/photos_off.gif";

mapon = new Image();
mapon.src = "images/map_on.gif";
mapoff = new Image();
mapoff.src = "images/map_off.gif";

navmapon = new Image();
navmapon.src = "images/nav/map_on.gif";
navmapoff = new Image();
navmapoff.src = "images/nav/map_off.gif";

answerson = new Image();
answerson.src = "images/answers_on.gif";
answersoff = new Image();
answersoff.src = "images/answers_off.gif";

navanswerson = new Image();
navanswerson.src = "images/nav/answers_on.gif";
navanswersoff = new Image();
navanswersoff.src = "images/nav/answers_off.gif";

// On function
function imgAct(imgName) {
    document[imgName].src = eval(imgName + "on.src");
}

// Off function
function imgInact(imgName) {
    document[imgName].src = eval(imgName + "off.src");
}