images = new Array(4);
images[0]='<img src="/resources/images/directory_home_toppic_1.jpg" alt="Photo: Images of Colorado College" width="663" height="201" border="0">';
images[1]='<img src="/resources/images/directory_home_toppic_2.jpg" alt="Photo: Images of Colorado College" width="663" height="201" border="0">';
images[2]='<img src="/resources/images/directory_home_toppic_3.jpg" alt="Photo: Images of Colorado College" width="663" height="201" border="0">';
images[3]='<img src="/resources/images/directory_home_toppic_4.jpg" alt="Photo: Images of Colorado College" width="663" height="201" border="0">';

index=Math.floor(Math.random() * images.length);

document.write(images[index]);