function showFlyer(pageUrl, pdfUrl, imageUrl, imageAlt)
{	
	var flyerHtml = createFlyerHtml(pageUrl, pdfUrl, imageUrl, imageAlt);
	var imageHolder = document.getElementById('mainImage');
	
	replaceHtml(imageHolder, flyerHtml);
}

function createFlyerHtml(pageUrl, pdfUrl, imageUrl, imageAlt)
{
	// PAGE LINK : <a href="files/2010-06-summer-flyer.html"><img src="images/concert_flyer_201006.jpg" width="448" height="600" alt="London Docklands Singers : Summer Concert : June 2010" /></a>
	// PDF LINK : <a href="files/2010-06-summer-flyer.pdf" target="_blank"><img src="images/concert_flyer_201006.jpg" width="448" height="600" alt="London Docklands Singers : Summer Concert : June 2010" /></a>
	// NO LINK : <img src="images/concert_flyer_201006.jpg" width="448" height="600" alt="London Docklands Singers : Summer Concert : June 2010" />
	
	var htmlString = "";
	var isLink = false;
	
	// LINK
	if (pageUrl != null || pdfUrl != null) {
		isLink = true;
		if (pageUrl != null) htmlString += '<a href="' + pageUrl +'">';
		else htmlString += '<a href="' + pdfUrl +'" target="_blank">';
	}
	
	// IMAGE
	htmlString += '<img src="' + imageUrl + '" width="448" height="600" alt="' + imageAlt + '" />';
	
	// CLOSE LINK
	if (isLink) htmlString += '</a>';
	
	return htmlString;
}