var maxIndex = referenceArr.length-1;
			var currentIndex = 0;

			function nextImage() {
				currentIndex++;
				if (currentIndex> maxIndex) {
					currentIndex = 0;
				}
				changeImage(referenceArr[currentIndex],captionArr[currentIndex],currentIndex);
			}

			function previousImage() {
				currentIndex--;
				if (currentIndex < 0) {
					currentIndex = maxIndex;
				}
				changeImage(referenceArr[currentIndex],captionArr[currentIndex],currentIndex);
			}

			            function changeImage(name, text, index) {
                                                               currentIndex = index;
                //alert(name);
                if(navigator.appName == 'Microsoft Internet Explorer') {
                    name = encImgName(name);
                }
                                                               document.images["main"].src = name;
                                                               document.getElementById("imagetext").innerHTML = text;
                document.getElementById("main").alt = text;
                                               }

            function encImgName(name) {
                var res = '';
                for(i=0;i<name.length;i++) {
                    var c = name.charAt(i);
                    if(c.charCodeAt(0) >= 159) {
                        res += escape(c);
                    }
                    else {
                        res += c;
                    }
                }
                return res;
            }

			
			function changeImageFull(vollbild,url) {
                 var div = document.getElementById("imgVollbild");
                 if(div) {
                 if(vollbild == 'J') {
                 var a = document.getElementById('imgVollbildA');
                 if(a) {
                 div.style.display = 'block';
                 if(navigator.appName == 'Microsoft Internet Explorer') {
                 url = encImgName(url);
                 }
                 a.href = url;
                 }
                 }
                 else {
                 div.style.display = 'none';
                 }
                 }
                 }