function createModalPreviews() {
	$$('.previewModal').each(function(link) {
			var vpHeight = document.viewport.getHeight();
			var targetHeight = vpHeight - 50;
			if((targetHeight) < 600) {
				new Control.Modal(link,{ opacity: 0.5, position: 'absolute', fade: true, fadeDuration: 0.5, height: targetHeight });
			} else {
				new Control.Modal(link,{ opacity: 0.5, position: 'absolute', fade: true, fadeDuration: 0.5 });
			}
    });
}