function drawRandomPictures() {
  var picked = new Array();
  var i = 0;
  while (true) {
    var num = Math.round(20 * Math.random()) + 1;
    if (picked[num]) continue;
    picked[num] = 1;
    i++;
    document.write("<img src='gheader/random/random-" + num + ".jpg' width='83' height='83' alt='seventh sense candles'/>");
    if (i >= 6) break;
  }
}