if (document.images) {
	homead = new Image();
	homead.src = "images/sanmarco.jpg";
	aboutad = new Image();         
	aboutad.src = "images/pic_about.jpg";      // Secondary Images
	eventsad = new Image();
	eventsad.src = "images/pic_events.jpg";
	newsad = new Image();
	newsad.src = "images/pic_news.jpg";
	contactad = new Image();
	contactad.src = "images/pic_contact.jpg";
	joinad = new Image();
	joinad.src = "images/pic_join.jpg";
}

// Function to 'activate' images.
function imgOn(imgName) {
	if (document.images) {
		document.getElementById('holder').src = eval(imgName + "ad.src");
	}
}