var menu_rules = {
  '.menu' : function(elem)
    {
      elem.onclick = function()
        {
          window.location = elem.id + ".php" ;
        }
    },
  '.thumbnails' : function(elem)
    {
      elem.onclick = function()
        {
           $('main_image').setAttribute('src', elem.src);
        }
    },
  '.toprightlink' : function(elem)
    {
      elem.onclick = function()
        {
          window.location = elem.id + ".php" ;
        }
    },
    '#logo' : function(elem)
    {
      elem.onclick = function()
      {
        window.location = "index.php" ;
      }
    },  
    '#cartina' : function(elem)
    {
      elem.onclick = function()
      {
        window.location = "info.php" ;
      }
    },
    '#venditacase' : function(elem)
    {
      elem.onclick = function()
      {
        window.location = "vendita-case-sardegna-posada.php" ;
      }
    }
}

Behaviour.register(menu_rules);

new Ajax.PeriodicalUpdater('', 'gallery.php?random=true&section=' + section, {
  method: 'get', frequency: 6, decay: 1,
  onSuccess: function(transport) {
    backg = 'url(' + transport.responseText + ')';
    $('foto').setStyle({ 'background': backg });
  }
});