var r = Math.random();
if (r < 0.01) {
  document.writeln('<img src="./gfx/peter-oops-baltimore-2007-tn.jpg" width="200" height="200" alt="Photo of Peter" />');
}
else if (r >= 0.01 && r < 0.02) {
  document.writeln('<img src="./gfx/peter-cambria-2002-tn.jpg" width="200" height="200" alt="Photo of Peter" />');
}
else {
  document.writeln('<img src="./gfx/peter-baltimore-2007-tn.jpg" width="200" height="200" alt="Photo of Peter" />');
}