// Interval time in ms
var interval = 3000;

// URL images
ImageArr1 = new Array();
ImageArr1[ImageArr1.length] = "bilder_oben/1.jpg";
ImageArr1[ImageArr1.length] = "bilder_oben/2.jpg";
ImageArr1[ImageArr1.length] = "bilder_oben/3.jpg";
ImageArr1[ImageArr1.length] = "bilder_oben/4.jpg";
ImageArr1[ImageArr1.length] = "bilder_oben/5.jpg";
ImageArr1[ImageArr1.length] = "bilder_oben/6.jpg";
ImageArr1[ImageArr1.length] = "bilder_oben/7.jpg";
ImageArr1[ImageArr1.length] = "bilder_oben/8.jpg";
ImageArr1[ImageArr1.length] = "bilder_oben/9.jpg";

// Function changeImage; changing images
function changeImage(img, arrname, imgid, i) {
	ImageArr = new Array();
	ImageArr = img;
	var size = ImageArr.length;

	if (i < size) {
		document.getElementById(imgid).src = ImageArr[i];
		i = i + 1;
     	setTimeout ('changeImage(' + arrname + ', "' + arrname + '", "' + imgid + '" , ' + i + ')', interval);
    }
  	else {
		i = 0;
    	changeImage(ImageArr, arrname, imgid, i);
    }
}

// start with delay
setTimeout('changeImage(ImageArr1, "ImageArr1", "img1", ' + 0 + ')', interval);