function loader()
{
  if (document.images) {
    preLoad = new Array();
    for (i = 0; i < 12; i ++){
      preLoad[i] = new Image();
    }
    preLoad[0].src = "/images/m11.jpg";
    preLoad[1].src = "/images/m12.jpg";
    preLoad[2].src = "/images/m21.jpg";
    preLoad[3].src = "/images/m22.jpg";
    preLoad[4].src = "/images/m31.jpg";
    preLoad[5].src = "/images/m32.jpg";
    preLoad[6].src = "/images/m41.jpg";
    preLoad[7].src = "/images/m42.jpg";
    preLoad[8].src = "/images/m51.jpg";
    preLoad[9].src = "/images/m52.jpg";
    preLoad[10].src = "/images/m61.jpg";
    preLoad[11].src = "/images/m62.jpg";
  }
}