function chooseExterior(newTile) {
	var tileSet = document.getElementsByTagName("IMG");
	for (var tileNo=0;tileNo!=tileSet.length-1;tileNo++) {
		if (tileSet[tileNo].name.match("extTile")) if (newTile!=tileSet[tileNo]) {
			tileSet[tileNo].className="imgNormal";
		}
	}
	newTile.className="imgSelect";
	document.images.exteriorPic.src = exteriorImages[newTile.name.substr(7)];
	document.images.exteriorPic.alt = newTile.alt;
	//document.getElementById("exteriorName").innerHTML = newTile.title;
}
function chooseInterior(newTile) {
	var tileSet = document.getElementsByTagName("IMG");
	for (var tileNo=0;tileNo!=tileSet.length-1;tileNo++) {
		if (tileSet[tileNo].name.match("intTile")) if (newTile!=tileSet[tileNo]) {
			tileSet[tileNo].className="imgNormal";
		}
	}
	newTile.className="imgSelect";
	document.images.interiorPic.src = interiorImages[newTile.name.substr(7)];
	document.images.interiorPic.alt = newTile.alt;
	//document.getElementById("interiorName").innerHTML = newTile.title;
}