var imagePath = "/www/images/";
if (document.images) {
	var imageOver = new makeImageArray(5);
	var imageOut = new makeImageArray(5);
	
	imageOver[0] = makeImage("but_glossary_on.gif");			imageOut[0] = makeImage("but_glossary.gif");
	imageOver[1] = makeImage("but_shared_stories_on.gif");		imageOut[1] = makeImage("but_shared_stories.gif");
	imageOver[2] = makeImage("but_cancer_services_on.gif");		imageOut[2] = makeImage("but_cancer_services.gif");
	imageOver[3] = makeImage("but_related_sites_on.gif");		imageOut[3] = makeImage("but_related_sites.gif");
	imageOver[4] = makeImage("but_events_activities_on.gif");	imageOut[4] = makeImage("but_events_activities.gif");
	imageOver[5] = makeImage("but_newsletter_on.gif");			imageOut[5] = makeImage("but_newsletter.gif");
	
};

function makeImageArray(n) {
	this.length = n;
	for (var i = 0; i <= n; i++) {
		this[i] = new Image();
	}
	return this;
};

function makeImage(sr) {
	var newImage = new Image();
	newImage.src = imagePath + sr;
	return newImage;
};

function swapImage(num, over) {
	var img = eval("document.images.img" + num);
	(over) ? img.src = imageOver[num].src : img.src = imageOut[num].src;
};