function lightboxOpen(imageTitle)
{
	/* cvk */
	imageFile = '/images/gallery/' + imageTitle + '_md.jpg';
	if(window.document.images) { window.document.images['lightbox'].src = imageFile; }
	else { window.document.getElementById('lightbox').src = imageFile; }
}
function toggleSheet(title) {
	/* cvk */
	if(document.styleSheets.length > 0) {
		for(i = 0; i < document.styleSheets.length; i++) {
			sheet = document.styleSheets[i];
			if(sheet.title == title)
				sheet.disabled = !sheet.disabled;
		}
	}
}