function showDescription(text) {

	if(document.getElementById) {
		var blurbContainer = document.getElementById('description');
		var explainText = document.createTextNode(text);
		blurbContainer.appendChild(explainText);
	}
}

function clearDescription() {
	if(document.getElementById) {
		var blurbContainer = document.getElementById('description');
		if(blurbContainer.hasChildNodes()) {
			blurbContainer.removeChild(blurbContainer.lastChild);
		}
	}
}

function changeImages() {
	if (document.images) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}