dir = './_media/bilder/galerie/';
galerie = new Array('Leistungen-Innen.jpg','1.jpg', '2.jpg', '3.jpg', '4.jpg', '5.jpg');

var index = 0;

function next() {
	index += 1;
	if(index > galerie.length - 1) index = 0;
	//alert(dir + galerie[index]);
	$('galpic').setProperty('src', dir + galerie[index]);
}

function previous() {
	index -= 1;
	if(index < 0) index = galerie.length - 1;
	//alert(dir + galerie[index]);
	$('galpic').setProperty('src', dir + galerie[index]);
}