var img = new Array('turnen1', 'turnen2', 'turnen3', 'turnen4');
var counter = 1;
var number_pics = 4;
var start = null;
var filesource = "images/";
var filename = "turnen";
var filetype = ".jpg";
var delayTime = 5000;
var title = "pictures";


function animate(){
 counter++;
 if(counter > number_pics) counter = 1;
 // document.getElementById("id_counter").textContent = counter; // show counter
 img[counter] = new Image();
 img[counter].src = filesource + filename + counter + filetype;
 document.getElementById("pic1").src = img[counter].src;
 if(counter == number_pics) counter = 0;
}

function slide(){
 // document.getElementById("id_counter").textContent = counter; // show counter
   start = setInterval("animate()", delayTime);
 //document.getElementById("id_title").textContent = title; // show title
 // document.getElementById("id_number_pics").textContent = number_pics; // show number pics
}