function nextPhoto(nr) 
{
	var url = 'ajax/galerie-foto.php';
    var pars = 'nr='+nr+'&tip='+1;
    var target = 'photo_tour';
    var myAjax = new Ajax.Updater(target, url, {method: 'get', parameters: pars});
}

function prevPhoto(nr) 
{
	var url = 'ajax/galerie-foto.php';
    var pars = 'nr='+nr+'&tip='+2;
    var target = 'photo_tour';
    var myAjax = new Ajax.Updater(target, url, {method: 'get', parameters: pars});
}