introon = new Image();
introon.src = "images/black/intro_on.gif";
introoff = new Image();
introoff.src = "images/black/intro_off.gif";

infoon = new Image();
infoon.src = "images/black/info_on.gif";
infooff = new Image();
infooff.src = "images/black/info_off.gif";

homeon = new Image();
homeon.src = "images/black/home_on.gif";
homeoff = new Image();
homeoff.src = "images/black/home_off.gif";

nexton = new Image();
nexton.src = "images/black/next_on.gif";
nextoff = new Image();
nextoff.src = "images/black/next_off.gif";

backon = new Image();
backon.src = "images/black/back_on.gif";
backoff = new Image();
backoff.src = "images/black/back_off.gif";

scripton = new Image();
scripton.src = "images/black/script_on.gif";
scriptoff = new Image();
scriptoff.src = "images/black/script_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");
}

function hov(loc,cls){
  if(loc.className)
  loc.className=cls;
}

function clearDefault(el) {
  if (el.defaultValue==el.value) el.value = ""
}