var buttons = Array(8);
var buttons_a = Array(8);

function loadImage() {
	for (var i=0; i < 8 ; i++) {
		buttons[i] = new Image();
		buttons_a[i] = new Image();
	}
	buttons[0].src = "img/inu.gif";

	buttons[1].src = "img/topics.jpg";
	buttons_a[1].src = "img/topics_a.jpg";
	buttons[2].src = "img/keep.jpg";
	buttons_a[2].src = "img/keep_a.jpg";
	buttons[3].src = "img/train.jpg";
	buttons_a[3].src = "img/train_a.jpg";
	buttons[4].src = "img/menu.jpg";
	buttons_a[4].src = "img/menu_a.jpg";
	buttons[5].src = "img/profile.jpg";
	buttons_a[5].src = "img/profile_a.jpg";
	buttons[6].src = "img/photo.jpg";
	buttons_a[6].src = "img/photo_a.jpg";
	buttons[7].src = "img/link.jpg";
	buttons_a[7].src = "img/link_a.jpg";
}

function swapImage(imgName,i) {
	var img = document.images[imgName];
	if (!img) img = findImage(document, imgName);
	if (buttons_a[i]) {
		img.src = buttons_a[i].src;
	} else {
		img.src = "img/" + imgName +  "_a.jpg";
	}
}

function returnImage(imgName,i) {
	var img = document.images[imgName];
	if (!img) img = findImage(document, imgName);
	if (buttons[i]) {
		img.src = buttons[i].src;
	} else {
		img.src = "img/" + imgName +  ".jpg";
	}
}

function reloadImage(imgName,i) {
	var img = document.images[imgName];
	if (!img) img = findImage(document, imgName);
	if (buttons[i]) {
		img.src = buttons[i].src;
	} else {
		img.src = "img/" + imgName +  ".gif";
	}
}

function findImage(doc, imgName)
{
  for (var i=0; i < doc.layers.length; i++)
  {
    var img = doc.layers[i].document.images[imgName];
    if (!img) img = findImage(doc.layers[i], imgName);
    if (img) return img;
  }
  return null;
}