cash_img = new Image();

function preload_images(name,path,count,start) {
  if (start) count += start - 1;
  i = (start) ? start : 1;

  for (; i <= count; i++)
  {
    idx = name + i;
    cash_img[idx] = new Image();
    cash_img[idx].src = path + i + '.gif';


    on_idx ='on_' + name + i;
    cash_img[on_idx] = new Image();
    cash_img[on_idx].src = path + i + 'a.gif';
  }
}

preload_images('m',  'http://i.domik.net/map/z',  9);
preload_images('sm', 'http://i.domik.net/map/z',  4);

cash_img['cmd2'] = new Image();
cash_img['cmd2'].src = 'http://i.domik.net/map/zs.gif';
cash_img['on_cmd2'] = new Image();
cash_img['on_cmd2'].src = 'http://i.domik.net/map/zsa.gif';

cash_img['cmd3'] = new Image();
cash_img['cmd3'].src = 'http://i.domik.net/map/zi.gif';
cash_img['on_cmd3'] = new Image();
cash_img['on_cmd3'].src = 'http://i.domik.net/map/zia.gif';

cash_img['cmd4'] = new Image();
cash_img['cmd4'].src = 'http://i.domik.net/map/zo.gif';
cash_img['on_cmd4'] = new Image();
cash_img['on_cmd4'].src = 'http://i.domik.net/map/zoa.gif';

cash_img['cmd5'] = new Image();
cash_img['cmd5'].src = 'http://i.domik.net/map/zc.gif';
cash_img['on_cmd5'] = new Image();
cash_img['on_cmd5'].src = 'http://i.domik.net/map/zca.gif';