// Create arrays to contain all the values for image locations
var random = Math.random();
var picnum = Math.round(random*3);
if (picnum > 3 || picnum < 1) picnum = 1;
 // Write the image tag with a random array element
	
document.write('<img src="http://www.bu.edu/bumo/grfx/'+picnum+'.jpg" alt="Musicians" />');