var thumbnailviewer=
	{
		enableTitle: true, //Should "title" attribute of link be used as description?
		enableAnimation: true, //Enable fading animation?
		definefooter: '<div class="footerbar"><div class="leftButton"><a href="javascript:thumbnailviewer.showPrev();" alt="vorheriges Bild" title="vorheriges Bild"><img src="media/images/buttonLeft.gif" alt="ein Bild zur&uuml;ck"/></a></div><div class="rightButton"><a href="javascript:thumbnailviewer.showNext();" title="ein Bild weiter"><img src="media/images/buttonRight.gif" alt="ein Bild weiter"/></a></div><div class="description" id="thumbDescritpion">Bildbeschreibung</div></div><br style="clear:both"/>', //Define HTML for footer interface
		defineLoading: '<img src="media/images/loading.gif" /> lade Bild ...', //Define HTML for "loading" div


		scrollbarwidth: 16,
		opacitystring: 'filter:progid:DXImageTransform.Microsoft.alpha(opacity=10); -moz-opacity: 0.1; opacity: 0.1',
		targetlinks:[], //Array to hold links with rel="thumbnail"

		thumbBox:null,
		darkLayer:null,
		aImageList:[],
		iCurrentElement:0,
		thumbDescritpion:null,
		createthumbBox:function(){
//write out HTML for Image Thumbnail Viewer plus loading div

document.write('<div id="darkScreenObject"></div>');

document.write('<div id="thumbBox"><div id="thumbClose"><a href="javascript:thumbnailviewer.closeit();" title="schlie&szlig;en"><img src="media/images/closeButton.gif"/></a></div><div id="thumbImage"></div>'+this.definefooter+'</div>')
document.write('<div id="thumbLoading">'+this.defineLoading+'</div>')
this.thumbBox=document.getElementById("thumbBox")
this.thumbImage=document.getElementById("thumbImage") //Reference div that holds the shown image
this.thumbLoading=document.getElementById("thumbLoading") //Reference "loading" div that will be shown while image is fetched
this.standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body //create reference to common "body" 
this.darkLayer = document.getElementById ("darkScreenObject");
this.thumbDescritpion = document.getElementById ('thumbDescritpion');
},


		centerDiv:function(divobj){ //Centers a div element on the page
			var ie=document.all && !window.opera
			var dom=document.getElementById
			var scroll_top=(ie)? this.standardbody.scrollTop : window.pageYOffset
			var scroll_left=(ie)? this.standardbody.scrollLeft : window.pageXOffset
			var docwidth=(ie)? this.standardbody.clientWidth : window.innerWidth-this.scrollbarwidth
			var docheight=(ie)? this.standardbody.clientHeight: window.innerHeight
			var docheightcomplete=(this.standardbody.offsetHeight>this.standardbody.scrollHeight)? this.standardbody.offsetHeight : this.standardbody.scrollHeight //Full scroll height of document
			var objwidth=divobj.offsetWidth //width of div element
			var objheight=divobj.offsetHeight //height of div element
			var topposition=(docheight>objheight)? scroll_top+docheight/2-objheight/2+"px" : scroll_top+10+"px" //Vertical position of div element: Either centered, or if element height larger than viewpoint height, 10px from top of viewpoint
			divobj.style.left=docwidth/2-objwidth/2+"px" //Center div element horizontally
			divobj.style.top=Math.floor(parseInt(topposition))+"px"
			divobj.style.visibility="visible"
		},

		showthumbBox:function(){ //Show ThumbBox div
			thumbnailviewer.thumbLoading.style.visibility="hidden" //Hide "loading" div
			this.centerDiv(this.thumbBox)
			if (this.enableAnimation){ //If fading animation enabled
				this.currentopacity=0.1 //Starting opacity value
				this.opacitytimer=setInterval("thumbnailviewer.opacityanimation()", 20)
			}
		},
		getDocHeight: function () {
	    var D = document;
	    return Math.max(
	        Math.max(D.body.scrollHeight, D.documentElement.scrollHeight),
	        Math.max(D.body.offsetHeight, D.documentElement.offsetHeight),
	        Math.max(D.body.clientHeight, D.documentElement.clientHeight)
	    );
		},
		showNext: function () {
			this.iCurrentElement++;
			if (this.iCurrentElement >=this.aImageList.length) this.iCurrentElement =0;
			this.loadimage (null);
		},
		showPrev: function () {
			this.iCurrentElement--;
			if (this.iCurrentElement<0) this.iCurrentElement =this.aImageList.length-1;
			this.loadimage (null);
		},
		loadimage:function(link){ //Load image function that gets attached to each link on the page with rel="thumbnail"
			
			if (link!=null) {
		
				this.iCurrentElement =0;
				
				//advanced ->store information for all images in array
				var aSplits = link.getAttribute ('href').split ('|');
				this.aImageList = [];
				for (var i=0; i<aSplits.length; i+=2) {
					this.aImageList.push ({image:aSplits[i], description:aSplits[i+1]});
				}
		
			}
			
			if (this.thumbBox.style.visibility=="visible") //if thumbox is visible on the page already
			this.closeit() //Hide it first (not doing so causes triggers some positioning bug in Firefox
			this.darkLayer.style.width= '100%';
    		this.darkLayer.style.top = '0px';
			this.darkLayer.style.display = 'block';
    		this.darkLayer.style.height= this.getDocHeight()+'px';
			this.darkLayer.style.backgroundColor='#000000';
			this.darkLayer.style.zIndex = 998;
			this.setimgopacity (this.darkLayer, 0.8);
			this.thumbBox.style.zIndex =999;
				var imageHTML='<img onclick="thumbnailviewer.imageclick ();" src="'+this.aImageList[this.iCurrentElement].image+'" style="'+this.opacitystring+'" />' //Construct HTML for shown image
			if (this.enableTitle) {
				this.thumbDescritpion.innerHTML = this.aImageList[this.iCurrentElement].description;
			}
			this.centerDiv(this.thumbLoading) //Center and display "loading" div while we set up the image to be shown
			this.thumbImage.innerHTML=imageHTML //Populate thumbImage div with shown image's HTML (while still hidden)
			this.featureImage=this.thumbImage.getElementsByTagName("img")[0] //Reference shown image itself
			if (this.featureImage.complete)
			thumbnailviewer.showthumbBox()
			else{
				this.featureImage.onload=function(){ //When target image has completely loaded
					thumbnailviewer.showthumbBox() //Display "thumbbox" div to the world!
				}
			}
			if (document.all && !window.createPopup) //Target IE5.0 browsers only. Address IE image cache not firing onload bug: panoramio.com/blog/onload-event/
			this.featureImage.src=this.aImageList[this.iCurrentElement].image
			this.featureImage.onerror=function(){ //If an error has occurred while loading the image to show
				thumbnailviewer.thumbLoading.style.visibility="hidden" //Hide "loading" div, game over
			}
		},

		setimgopacity:function(tObject, value){ //Sets the opacity of "thumbimage" div per the passed in value setting (0 to 1 and in between)
			var targetobject=tObject;
			if (targetobject.filters && targetobject.filters[0]){ //IE syntax
				if (typeof targetobject.filters[0].opacity=="number") //IE6
				targetobject.filters[0].opacity=value*100
				else //IE 5.5
				targetobject.style.filter="alpha(opacity="+value*100+")"
			}
			else if (typeof targetobject.style.MozOpacity!="undefined") //Old Mozilla syntax
			targetobject.style.MozOpacity=value
			else if (typeof targetobject.style.opacity!="undefined") //Standard opacity syntax
			targetobject.style.opacity=value
			else //Non of the above, stop opacity animation
			this.stopanimation()
		},
imageclick:function () {
		 	this.showNext ();
		},
		opacityanimation:function(){ //Gradually increase opacity function
			this.setimgopacity(this.featureImage,this.currentopacity)
			this.currentopacity+=0.1
			if (this.currentopacity>1)
			this.stopanimation()
		},

		stopanimation:function(){
			if (typeof this.opacitytimer!="undefined")
			clearInterval(this.opacitytimer)
		},


closeit:function(){ //Close "thumbbox" div function
thumbnailviewer.stopanimation()
thumbnailviewer.thumbBox.style.visibility="hidden"
thumbnailviewer.thumbImage.innerHTML=""
thumbnailviewer.thumbBox.style.left="-2000px"
thumbnailviewer.thumbBox.style.top="-2000px"
thumbnailviewer.darkLayer.style.display ='none';
},

cleanup:function(){ //Clean up routine on page unload
this.thumbLoading=null
if (this.featureImage) this.featureImage.onload=null
this.featureImage=null
this.thumbImage=null
for (var i=0; i<this.targetlinks.length; i++)
this.targetlinks[i].onclick=null
this.thumbBox=null
},

dotask:function(target, functionref, tasktype){ //assign a function to execute to an event handler (ie: onunload)
var tasktype=(window.addEventListener)? tasktype : "on"+tasktype
if (target.addEventListener)
target.addEventListener(tasktype, functionref, false)
else if (target.attachEvent)
target.attachEvent(tasktype, functionref)
},

init:function(){ //Initialize thumbnail viewer script by scanning page and attaching appropriate function to links with rel="thumbnail"


if (!this.enableAnimation)
this.opacitystring=""
var pagelinks=document.getElementsByTagName("a")
for (var i=0; i<pagelinks.length; i++){ //BEGIN FOR LOOP
if (pagelinks[i].getAttribute("rel") && pagelinks[i].getAttribute("rel")=="thumbnail"){ //Begin if statement
pagelinks[i].onclick=function(){
thumbnailviewer.stopanimation() //Stop any currently running fade animation on "thumbbox" div before proceeding
thumbnailviewer.loadimage(this) //Load image
return false
}
this.targetlinks[this.targetlinks.length]=pagelinks[i] //store reference to target link
} //end if statement
} //END FOR LOOP
//Reposition "thumbbox" div when page is resized
this.dotask(window, function(){if (thumbnailviewer.thumbBox.style.visibility=="visible") thumbnailviewer.centerDiv(thumbnailviewer.thumbBox)}, "resize")


} //END init() function

}
thumbnailviewer.createthumbBox() //Output HTML for the image thumbnail viewer