var currentDate = new Date();

if (currentDate.getMonth() <= 10 && currentDate.getDate() <= 20 && currentDate.getFullYear() <= 2008) {
  images = new Array(2); 
  images[0] = "<img src='images/margaretelliott.jpg' title='Margaret Elliott'>";
  images[1] = "<img src='images/margaretelliott.jpg' title='Margaret Elliott'>";
  index = Math.floor(Math.random() * images.length);
  document.write(images[index]);
}