var counter = 1;
								// vorbutton funktion
								function swap(picture, folder, maxPic)
								{
								if (counter == maxPic) {counter = 1;} else {counter += 1;MM_preloadImages('bilder/"+folder+"/4el"+counter+".jpg');};
								var xchange= "../bilder/"+folder+"/4el"+counter+".jpg";
								document.images[picture].src=xchange; 
								}
								// zurueckbutton funktion
								function swapR(picture, folder, maxPic)
								{
								if (counter == 1) {counter = maxPic;} else {counter -= 1;};
								var xchange= "bilder/"+folder+"/4el"+counter+".jpg";
								document.images[picture].src=xchange;
								}
								
								/*den link vergeben mit:
									javascript:swap('bildname','ordner', 'anzahl');
								*/