function changeimages()
{
	if (document && document.images)
	 document[changeimages.arguments[0]].src =changeimages.arguments[1];
}


var images = new Array();

function preload(name, ext)
{
  path                = '/data/Image/mapa-jaco/';
  /*
  temp_array          = new Array();
  temp_array['a']     = new Image();
  temp_array['a'].src = path + name + '_a.' + ext;
  temp_array['b']     = new Image();
  temp_array['b'].src = path + name + '_b.' + ext;
  */
  images[name]        = new Image();
  images[name].src    = path + name + '.' + ext;
}

function toggle_image(name, which)
{
  img_elem        = document.getElementById(name);
  img_elem.src    = images[which].src;
}