image-ak = new Image(0,0);
image-ak.src = "assets/nz-map-ak.jpg";

image-auckland-south = new Image(0,0);
image-auckland-south.src = "assets/nz-map-auckland-southselected.jpg";

function showImage(imgName){
	document.getElementById("mapcus").src = imgName.src;
	return true;
}

function showOrig(){
	showImage(image-ak);
}

function showAucklandSouth(){
	showImage(image-auckland-south);
}