var countBig = 46;	//this is the number of "thumb_lg_x.gif" pictures in the images directory.

var rnd, picnum;

rnd = Math.random();
picnum = Math.round(rnd*(countBig-1))+1;

document.write('<img src="http://www.bus.brocku.ca/images/thumb/thumb_lg_'+picnum+'.jpg" alt="Faculty of Business Photograph" width="190" height="170">');