var aryImages = new Array(10);

  aryImages[0] = "images/aula_1.jpg";
  aryImages[1] = "images/aula_2.jpg";
  aryImages[2] = "images/aula_3.jpg";
  aryImages[3] = "images/aula_4.jpg";
  aryImages[4] = "images/aula_5.jpg";
  aryImages[5] = "images/aula_6.jpg";
  aryImages[6] = "images/aula_7.jpg";
  aryImages[7] = "images/aula_8.jpg";
  aryImages[8] = "images/aula_9.jpg";
  aryImages[9] = "images/aula_10.jpg";

  for (i=0; i < aryImages.length; i++) {
    var preload = new Image();
    preload.src = aryImages[i];
  }

  var aryImagesT = new Array(10);

  aryImagesT[0] = "images/aula_1t.jpg";
  aryImagesT[1] = "images/aula_2t.jpg";
  aryImagesT[2] = "images/aula_3t.jpg";
  aryImagesT[3] = "images/aula_4t.jpg";
  aryImagesT[4] = "images/aula_5t.jpg";
  aryImagesT[5] = "images/aula_6t.jpg";
  aryImagesT[6] = "images/aula_7t.jpg";
  aryImagesT[7] = "images/aula_8t.jpg";
  aryImagesT[8] = "images/aula_9t.jpg";
  aryImagesT[9] = "images/aula_10t.jpg";