function imageSwap (thisElement,newImage) {
	currentMouse = document.getElementById(thisElement);
	currentMouse.setAttribute("src", newImage);
}



toggle = 0;
book = 1;

function findFirstIm(o) {

	var fc;
	if (o) {
		if (o.id && o.id.substring(0,2) == 'im') {
			return o;
		}
		for (var c = o.firstChild; c != null; c = c.nextSibling) {
			fc = findFirstIm(c);
			if (fc)
			{
				break;
			}
		}
	}

	return fc;
}


function setShow(newBook) {
	if (toggle < 1)  {
		showSet = document.getElementById("pf" + book);
	}
	showSet.style.display = 'none';

	setDiv = document.getElementById(newBook);
	setDiv.style.display = 'block';
	// show first image as well:
	setImg = findFirstIm(setDiv);
	if (setImg) {
		pieceShow(setImg.id);
	}
	toggle = 1;
	showSet = document.getElementById(newBook);
	return false;
}


froggle = 0;
page = 1;

function pieceShow(newPage) {
	if (froggle < 1)  {
		showPiece = document.getElementById("im" + page);
	}
	showPiece.style.display = 'none';
	pieceDiv = document.getElementById(newPage);
	pieceDiv.style.display = 'block';
	froggle = 1;
	showPiece = document.getElementById(newPage);
	return false;
}