var n = 1; // default image
	var r = 1; // total number of images
	n = (Math.round(Math.random()*(r - 1)) + 1);
	i = "images/undp_armenia_art_" + n + ".jpg";
	document.write('<style type="text/css">.banner {');
	document.write('background-image: url(' + i + ');}</style>');