if(document.images)
{
  var image_array = new Array();

  // path to the directory with images
  var path = './images/';

  // enumeration of the "active" images
  image_array[0] = path + "butonhomeverde.jpg";
  image_array[1] = path + "butonnoutativerde.jpg";
  image_array[2] = path + "butonpeisajeverde.jpg";
  image_array[3] = path + "butonevenimentverde.jpg";
  image_array[4] = path + "butoncomercialverde.jpg";
  image_array[5] = path + "butonoameniverde.jpg";
  image_array[6] = path + "butoncontactverde.jpg";
  image_array[7] = path + "butonvernisajeverde.jpg";


  var preload_image = new Array ();

  for(var i=0; i<image_array.length; i++)
  {
    preload_image[i]= new Image();
    preload_image[i].src = image_array[i];
  }
}
function rollover(name, filename)
{
  var fullpath = './images/' + filename;
  document.images[name].src = fullpath;
}