			<!-- // JavaScript
			function randomNumber(limit){
			  return Math.floor(Math.random()*limit);
			}
			fileNumber = randomNumber(4);
			if (fileNumber <= 4){
			fileNumber ="0"+fileNumber;
			}
			document.write ('<img src="/images/banner'+fileNumber+'.jpg" width="838" height="43" alt="Center for Sustainability in Engineering" class="banner" />');
			// -->