// customize transitions
Effect.Transitions.Bounce = function(pos) { 
   if (pos < (1/2.75)) {
        return (7.5625*pos*pos);
    } else if (pos < (2/2.75)) {
        return (7.5625*(pos-=(1.5/2.75))*pos + .75);
    } else if (pos < (2.5/2.75)) {
        return (7.5625*(pos-=(2.25/2.75))*pos + .9375);
    } else {
        return (7.5625*(pos-=(2.625/2.75))*pos + .984375);
    }
};

Effect.Transitions.BouncePast = function(pos) { 
    if (pos < (1/2.75)) { 
        return (7.5625*pos*pos); 
    } else if (pos < (2/2.75)) { 
        return 2 - (7.5625*(pos-=(1.5/2.75))*pos + .75); 
    } else if (pos < (2.5/2.75)) { 
        return 2 - (7.5625*(pos-=(2.25/2.75))*pos + .9375); 
    } else { 
        return 2 - (7.5625*(pos-=(2.625/2.75))*pos + .984375); 
    } 
};
Effect.Transitions.Elastic = function(pos) { 
    return -1*Math.pow(4,-8*pos) * Math.sin((pos*6-1)*(2*Math.PI)/2) + 1; 
}; 
Effect.Transitions.SwingFromTo = function(pos) { 
    var s = 1.70158; 
    if ((pos/=0.5) < 1) return 0.5*(pos*pos*(((s*=(1.525))+1)*pos - s)); 
    return 0.5*((pos-=2)*pos*(((s*=(1.525))+1)*pos + s) + 2); 
}; 
Effect.Transitions.SwingFrom = function(pos) { 
    var s = 1.70158; 
    return pos*pos*((s+1)*pos - s); 
}; 
Effect.Transitions.SwingTo = function(pos) { 
    var s = 1.70158; 
    return (pos-=1)*pos*((s+1)*pos + s) + 1; 
};


TopCenter = function(sx, sy, px, py, pw, ph){
    var top  = -( py + sy);
    var left = sx - px;
    return [left, top];
}
TopLeft = function(sx, sy, px, py, pw, ph){
    var top  = -( py + sy);
    var left = -( px + sx);
    return [left, top];
}
TopRight = function(sx, sy, px, py, pw, ph){
    var top  = -( py + sy);
    var left = ( px + sx);
    return [left, top];
}
CenterLeft = function(sx, sy, px, py, pw, ph){
    var top  = sy-py;
    var left = -( px + sx);
    return [left, top];
}
BottomLeft = function(sx, sy, px, py, pw, ph){
    var top  = ( py + sy);
    var left = -( px + sx);
    return [left, top];
}
BottomRight = function(sx, sy, px, py, pw, ph){
    var top  = ( py + sy);
    var left = ( px + sx);
    return [left, top];
}
CenterRight = function(sx, sy, px, py, pw, ph){
    var top  = sy-py;
    var left = ( px + sx);
    return [left, top];
}
BottomCenter = function(sx, sy, px, py, pw, ph){
    var top  = ( py + sy);
    var left = sx - px;
    return [left, top];
}


Circular = function(sx, sy, px, py, pw, ph){
    var center_x = (px+pw)-sx;// + (pw/slice_width)/2;
    var center_y = (py+ph)-sy;// + (ph/slice_height)/2;

    
    // find shortest distance to a border EAST/WEST/NORTH/SOUTH
    var d_east = pw - center_x;
    var d_west = center_x;
    var d_north = center_y;
    var d_south = ph - center_y;
    
    var min = Math.max(Math.max(d_east, d_west), Math.max(d_north, d_south));

    var top = 0;
    var left = 0;
    
    switch(min){
        case d_east:
            return CenterRight(sx, sy, px, py, pw, ph);
        case d_west:
            return CenterLeft(sx, sy, px, py, pw, ph);
        case d_north:
            return TopCenter(sx, sy, px, py, pw, ph);
        case d_south:
            return BottomCenter(sx, sy, px, py, pw, ph);
        default:
            top  = sy-py;
            left = ( px + sx);            
    }
    return [left, top];
}




var slice_pos = TopCenter;
// top position of lightbox, if pos < 0 the center position is calculated
var box_top=10;

// left position of lightbox, if pos < 0 the center position is calculated
var box_left=-1;

// number of horizontal slices >0 !
var slice_width = 1;
// number of vertical slices >0 !
var slice_height = 3;	    


// slice animation duration
var slice_duration = 3;
// slice delay 
var slice_delay_fraction = 0.6;
// order of slices
var slice_reverse = true;

// enable the alpha fade of slices
var slice_use_alphafade = true;
// delay added to the slice animation, e.g. 0.2 means alpha fade begins 0.2 seconds after
// the slice move animation
var slice_alpha_delay = 0.1;
// start alpha value
var slice_alpha_begin = 0.0;
// end alpha value
var slice_alpha_end = 1.0;

/* this can be:
 Effect.Transitions.SwingTo
 Effect.Transitions.SwingFromTo
 Effect.Transitions.Bounce -> set reverse to true
 Effect.Transitions.Elastic
 Effect.Transitions.BouncePast
*/
//var slice_transition = Effect.Transitions.Bounce;
var slice_transition = Effect.Transitions.Bounce;

// number of slices, do not change unless u know waht u are doing

// simple bound check
if(slice_width <=0 ) slice_width = 1;
if(slice_height <= 0) slice_height = 1;

var slices = slice_width*slice_height;
// slice animation speed 
var slice_speed = slice_duration/slices;


// -----------------------------------------------------------------------------------
//
//	Lightbox v2.03.3
//	by Lokesh Dhakar - http://www.huddletogether.com
//	5/21/06
//
//	For more information on this script, visit:
//	http://huddletogether.com/projects/lightbox2/
//
//	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
//	
//	Credit also due to those who have helped, inspired, and made their code available to the public.
//	Including: Scott Upton(uptonic.com), Peter-Paul Koch(quirksmode.com), Thomas Fuchs(mir.aculo.us), and others.
//
//
// -----------------------------------------------------------------------------------
/*

	Table of Contents
	-----------------
	Configuration
	Global Variables

	Extending Built-in Objects	
	- Object.extend(Element)
	- Array.prototype.removeDuplicates()
	- Array.prototype.empty()

	Lightbox Class Declaration
	- initialize()
	- updateImageList()
	- start()
	- changeImage()
	- resizeImageContainer()
	- showImage()
	- updateDetails()
	- updateNav()
	- enableKeyboardNav()
	- disableKeyboardNav()
	- keyboardAction()
	- preloadNeighborImages()
	- end()
	
	Miscellaneous Functions
	- getPageScroll()
	- getPageSize()
	- getKey()
	- listenKey()
	- showSelectBoxes()
	- hideSelectBoxes()
	- showFlash()
	- hideFlash()
	- pause()
	- initLightbox()
	
	Function Calls
	- addLoadEvent(initLightbox)
	
*/
// -----------------------------------------------------------------------------------

//
//	Configuration
//
var fileLoadingImage = "images/loading.gif";		
var fileBottomNavCloseImage = "images/closelabel.gif";

var overlayOpacity = 0.8;	// controls transparency of shadow overlay

var animate = true;			// toggles resizing animations
var resizeSpeed = 7;		// controls the speed of the image resizing animations (1=slowest and 10=fastest)

var borderSize = 10;		//if you adjust the padding in the CSS, you will need to update this variable

// -----------------------------------------------------------------------------------

//
//	Global Variables
//
var imageArray = new Array;
var activeImage;


if(animate == true){
	overlayDuration = 0.2;	// shadow fade in/out duration
	if(resizeSpeed > 10){ resizeSpeed = 10;}
	if(resizeSpeed < 1){ resizeSpeed = 1;}
	resizeDuration = (11 - resizeSpeed) * 0.15;
} else { 
	overlayDuration = 0;
	resizeDuration = 0;
}

// -----------------------------------------------------------------------------------

//
//	Additional methods for Element added by SU, Couloir
//	- further additions by Lokesh Dhakar (huddletogether.com)
//
Object.extend(Element, {
	getWidth: function(element) {
	   	element = $(element);
	   	return element.offsetWidth; 
	},
	setWidth: function(element,w) {
	   	element = $(element);
    	element.style.width = w +"px";
	},
	setHeight: function(element,h) {
   		element = $(element);
    	element.style.height = h +"px";
	},
	setTop: function(element,t) {
	   	element = $(element);
    	element.style.top = t +"px";
	},
	setLeft: function(element,l) {
	   	element = $(element);
    	element.style.left = l +"px";
	},
	setSrc: function(element,src) {
    	element = $(element);
    	element.src = src; 
	},
	setHref: function(element,href) {
    	element = $(element);
    	element.href = href; 
	},
	setInnerHTML: function(element,content) {
		element = $(element);
		element.innerHTML = content;
	}
});

// -----------------------------------------------------------------------------------

//
//	Extending built-in Array object
//	- array.removeDuplicates()
//	- array.empty()
//
Array.prototype.removeDuplicates = function () {
    for(i = 0; i < this.length; i++){
        for(j = this.length-1; j>i; j--){        
            if(this[i][0] == this[j][0]){
                this.splice(j,1);
            }
        }
    }
}

// -----------------------------------------------------------------------------------

Array.prototype.empty = function () {
	for(i = 0; i <= this.length; i++){
		this.shift();
	}
}

// -----------------------------------------------------------------------------------

//
//	Lightbox Class Declaration
//	- initialize()
//	- start()
//	- changeImage()
//	- resizeImageContainer()
//	- showImage()
//	- updateDetails()
//	- updateNav()
//	- enableKeyboardNav()
//	- disableKeyboardNav()
//	- keyboardNavAction()
//	- preloadNeighborImages()
//	- end()
//
//	Structuring of code inspired by Scott Upton (http://www.uptonic.com/)
//
var Lightbox = Class.create();

Lightbox.prototype = {
	
	// initialize()
	// Constructor runs on completion of the DOM loading. Calls updateImageList and then
	// the function inserts html at the bottom of the page which is used to display the shadow 
	// overlay and the image container.
	//
	initialize: function() {	
		
		this.updateImageList();

		// Code inserts html at the bottom of the page that looks similar to this:
		//
		//	<div id="overlay"></div>
		//	<div id="lightbox">
		//		<div id="outerImageContainer">
		//			<div id="imageContainer">
		//				<img id="lightboxImage">
		//				<div style="" id="hoverNav">
		//					<a href="#" id="prevLink"></a>
		//					<a href="#" id="nextLink"></a>
		//				</div>
		//				<div id="loading">
		//					<a href="#" id="loadingLink">
		//						<img src="images/loading.gif">
		//					</a>
		//				</div>
		//			</div>
		//		</div>
		//		<div id="imageDataContainer">
		//			<div id="imageData">
		//				<div id="imageDetails">
		//					<span id="caption"></span>
		//					<span id="numberDisplay"></span>
		//				</div>
		//				<div id="bottomNav">
		//					<a href="#" id="bottomNavClose">
		//						<img src="images/close.gif">
		//					</a>
		//				</div>
		//			</div>
		//		</div>
		//	</div>


		var objBody = document.getElementsByTagName("body").item(0);
		
		var objOverlay = document.createElement("div");
		objOverlay.setAttribute('id','overlay');
		objOverlay.style.display = 'none';
		objOverlay.onclick = function() { myLightbox.end(); }
		objBody.appendChild(objOverlay);
		
		var objLightbox = document.createElement("div");
		objLightbox.setAttribute('id','lightbox');
		objLightbox.style.display = 'none';
		objLightbox.onclick = function(e) {	// close Lightbox is user clicks shadow overlay
			if (!e) var e = window.event;
			var clickObj = Event.element(e).id;
			if ( clickObj == 'lightbox') {
				myLightbox.end();
			}
		};
		objBody.appendChild(objLightbox);
			
		var objOuterImageContainer = document.createElement("div");
		objOuterImageContainer.setAttribute('id','outerImageContainer');
		objLightbox.appendChild(objOuterImageContainer);

		// When Lightbox starts it will resize itself from 250 by 250 to the current image dimension.
		// If animations are turned off, it will be hidden as to prevent a flicker of a
		// white 250 by 250 box.
		if(animate){
			Element.setWidth('outerImageContainer', 250);
			Element.setHeight('outerImageContainer', 250);			
		} else {
			Element.setWidth('outerImageContainer', 1);
			Element.setHeight('outerImageContainer', 1);			
		}

		var objImageContainer = document.createElement("div");
		objImageContainer.setAttribute('id','imageContainer');
		objOuterImageContainer.appendChild(objImageContainer);
	
		var objLightboxImage = document.createElement("img");
		objLightboxImage.setAttribute('id','lightboxImage');
		objImageContainer.appendChild(objLightboxImage);
	
		var objHoverNav = document.createElement("div");
		objHoverNav.setAttribute('id','hoverNav');
		objImageContainer.appendChild(objHoverNav);
	
		var objPrevLink = document.createElement("a");
		objPrevLink.setAttribute('id','prevLink');
		objPrevLink.setAttribute('href','#');
		objHoverNav.appendChild(objPrevLink);
		
		var objNextLink = document.createElement("a");
		objNextLink.setAttribute('id','nextLink');
		objNextLink.setAttribute('href','#');
		objHoverNav.appendChild(objNextLink);
	
		var objLoading = document.createElement("div");
		objLoading.setAttribute('id','loading');
		objImageContainer.appendChild(objLoading);
	
		var objLoadingLink = document.createElement("a");
		objLoadingLink.setAttribute('id','loadingLink');
		objLoadingLink.setAttribute('href','#');
		objLoadingLink.onclick = function() { myLightbox.end(); return false; }
		objLoading.appendChild(objLoadingLink);
	
		var objLoadingImage = document.createElement("img");
		objLoadingImage.setAttribute('src', fileLoadingImage);
		objLoadingLink.appendChild(objLoadingImage);

		var objImageDataContainer = document.createElement("div");
		objImageDataContainer.setAttribute('id','imageDataContainer');
		objLightbox.appendChild(objImageDataContainer);

		var objImageData = document.createElement("div");
		objImageData.setAttribute('id','imageData');
		objImageDataContainer.appendChild(objImageData);
	
		var objImageDetails = document.createElement("div");
		objImageDetails.setAttribute('id','imageDetails');
		objImageData.appendChild(objImageDetails);
	
		var objCaption = document.createElement("span");
		objCaption.setAttribute('id','caption');
		objImageDetails.appendChild(objCaption);
	
		var objNumberDisplay = document.createElement("span");
		objNumberDisplay.setAttribute('id','numberDisplay');
		objImageDetails.appendChild(objNumberDisplay);
		
		var objBottomNav = document.createElement("div");
		objBottomNav.setAttribute('id','bottomNav');
		objImageData.appendChild(objBottomNav);
	
		var objBottomNavCloseLink = document.createElement("a");
		objBottomNavCloseLink.setAttribute('id','bottomNavClose');
		objBottomNavCloseLink.setAttribute('href','#');
		objBottomNavCloseLink.onclick = function() { myLightbox.end(); return false; }
		objBottomNav.appendChild(objBottomNavCloseLink);
	
		var objBottomNavCloseImage = document.createElement("img");
		objBottomNavCloseImage.setAttribute('src', fileBottomNavCloseImage);
		objBottomNavCloseLink.appendChild(objBottomNavCloseImage);
	},


	//
	// updateImageList()
	// Loops through anchor tags looking for 'lightbox' references and applies onclick
	// events to appropriate links. You can rerun after dynamically adding images w/ajax.
	//
	updateImageList: function() {	
		if (!document.getElementsByTagName){ return; }
		var anchors = document.getElementsByTagName('a');
		var areas = document.getElementsByTagName('area');

		// loop through all anchor tags
		for (var i=0; i<anchors.length; i++){
			var anchor = anchors[i];
			
			var relAttribute = String(anchor.getAttribute('rel'));
			
			// use the string.match() method to catch 'lightbox' references in the rel attribute
			if (anchor.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))){
				anchor.onclick = function () {myLightbox.start(this); return false;}
			}
		}

		// loop through all area tags
		// todo: combine anchor & area tag loops
		for (var i=0; i< areas.length; i++){
			var area = areas[i];
			
			var relAttribute = String(area.getAttribute('rel'));
			
			// use the string.match() method to catch 'lightbox' references in the rel attribute
			if (area.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))){
				area.onclick = function () {myLightbox.start(this); return false;}
			}
		}
	},
	
	
	//
	//	start()
	//	Display overlay and lightbox. If image is part of a set, add siblings to imageArray.
	//
	start: function(imageLink) {	

		hideSelectBoxes();
		hideFlash();
		
		// disable scrolling-> untested in other browsers, enabled in end() again
    	document.body.style.overflow="hidden";

		// stretch overlay to fill page and fade in
		var arrayPageSize = getPageSize();
		Element.setWidth('overlay', arrayPageSize[0]);
		Element.setHeight('overlay', arrayPageSize[1]);

		new Effect.Appear('overlay', { duration: overlayDuration, from: 0.0, to: overlayOpacity });

		imageArray = [];
		imageNum = 0;		

		if (!document.getElementsByTagName){ return; }
		var anchors = document.getElementsByTagName( imageLink.tagName);

		// if image is NOT part of a set..
		if((imageLink.getAttribute('rel') == 'lightbox')){
			// add single image to imageArray
			imageArray.push(new Array(imageLink.getAttribute('href'), imageLink.getAttribute('title')));			
		} else {
		// if image is part of a set..

			// loop through anchors, find other images in set, and add them to imageArray
			for (var i=0; i<anchors.length; i++){
				var anchor = anchors[i];
				if (anchor.getAttribute('href') && (anchor.getAttribute('rel') == imageLink.getAttribute('rel'))){
					imageArray.push(new Array(anchor.getAttribute('href'), anchor.getAttribute('title')));
				}
			}
			imageArray.removeDuplicates();
			while(imageArray[imageNum][0] != imageLink.getAttribute('href')) { imageNum++;}
		}

		// calculate top and left offset for the lightbox 
		var arrayPageScroll = getPageScroll();
		var lightboxTop = box_top >=0 ? box_top : arrayPageScroll[1] + (arrayPageSize[3] / 10);
		var lightboxLeft = box_left >=0 ? box_left : arrayPageScroll[0];
		Element.setTop('lightbox', lightboxTop);
		Element.setLeft('lightbox', lightboxLeft);
		
		Element.show('lightbox');
		
		this.changeImage(imageNum);
	},

	//
	//	changeImage()
	//	Hide most elements and preload image in preparation for resizing image container.
	//
	changeImage: function(imageNum) {	
		
		activeImage = imageNum;	// update global var

		// hide elements during transition
		if(animate){ Element.show('loading');}
		Element.hide('lightboxImage');
		Element.hide('hoverNav');
		Element.hide('prevLink');
		Element.hide('nextLink');
		Element.hide('imageDataContainer');
		Element.hide('numberDisplay');		
		
		imgPreloader = new Image();
		
		// once image is preloaded, resize image container
		imgPreloader.onload=function(){
			Element.setSrc('lightboxImage', imageArray[activeImage][0]);
			
			// slice the image before resizing container
			myLightbox.sliceImage();
			
			/// disable animated resize-> switched to fixed resize without animation !
			//myLightbox.resizeImageContainer(imgPreloader.width, imgPreloader.height);
			myLightbox.resizeImageContainerFast(imgPreloader.width, imgPreloader.height);
			
			imgPreloader.onload=function(){};	//	clear onLoad, IE behaves irratically with animated gifs otherwise 
		}
		imgPreloader.src = imageArray[activeImage][0];
	},

	resizeImageContainerFast: function( imgWidth, imgHeight) {

		// get curren width and height
		this.widthCurrent = Element.getWidth('outerImageContainer');
		this.heightCurrent = Element.getHeight('outerImageContainer');

		// get new width and height
		var widthNew = (imgWidth  + (borderSize * 2));
		var heightNew = (imgHeight  + (borderSize * 2));

		// scalars based on change from old to new
		this.xScale = ( widthNew / this.widthCurrent) * 100;
		this.yScale = ( heightNew / this.heightCurrent) * 100;

		// calculate size difference between new and old image, and resize if necessary
		wDiff = this.widthCurrent - widthNew;
		hDiff = this.heightCurrent - heightNew;

		if(!( hDiff == 0)){ new Effect.Scale('outerImageContainer', this.yScale, {scaleX: false, duration: 0, queue: 'front'}); }
		if(!( wDiff == 0)){ new Effect.Scale('outerImageContainer', this.xScale, {scaleY: false, delay: 0, duration: 0}); }

		// if new and old image are same size and no scaling transition is necessary, 
		// do a quick pause to prevent image flicker.
		if((hDiff == 0) && (wDiff == 0)){
			if (navigator.appVersion.indexOf("MSIE")!=-1){ pause(250); } else { pause(100);} 
		}

		Element.setHeight('prevLink', imgHeight);
		Element.setHeight('nextLink', imgHeight);
		Element.setWidth( 'imageDataContainer', widthNew);

		this.showImage();
	},

	//
	//	resizeImageContainer()
	//
	resizeImageContainer: function( imgWidth, imgHeight) {

		// get curren width and height
		this.widthCurrent = Element.getWidth('outerImageContainer');
		this.heightCurrent = Element.getHeight('outerImageContainer');

		// get new width and height
		var widthNew = (imgWidth  + (borderSize * 2));
		var heightNew = (imgHeight  + (borderSize * 2));

		// scalars based on change from old to new
		this.xScale = ( widthNew / this.widthCurrent) * 100;
		this.yScale = ( heightNew / this.heightCurrent) * 100;

		// calculate size difference between new and old image, and resize if necessary
		wDiff = this.widthCurrent - widthNew;
		hDiff = this.heightCurrent - heightNew;

		if(!( hDiff == 0)){ new Effect.Scale('outerImageContainer', this.yScale, {scaleX: false, duration: resizeDuration, queue: 'front'}); }
		if(!( wDiff == 0)){ new Effect.Scale('outerImageContainer', this.xScale, {scaleY: false, delay: resizeDuration, duration: resizeDuration}); }

		// if new and old image are same size and no scaling transition is necessary, 
		// do a quick pause to prevent image flicker.
		if((hDiff == 0) && (wDiff == 0)){
			if (navigator.appVersion.indexOf("MSIE")!=-1){ pause(250); } else { pause(100);} 
		}

		Element.setHeight('prevLink', imgHeight);
		Element.setHeight('nextLink', imgHeight);
		Element.setWidth( 'imageDataContainer', widthNew);

		this.showImage();
	},
	
	//
	//	showImage()
	//	Display image and begin preloading neighbors.
	//
	showImage: function(){
		Element.hide('loading');
		var imgElement = $('lightboxImage');	

		// hight and width per slice	
		var size = new Image();
        size.src = imgElement.src;
	    
	    var h = Math.round(size.height/slice_height);            
	    var w = Math.round(size.width/slice_width);    
	    
		/// disabled old effect
		//new Effect.Appear('lightboxImage', { duration: resizeDuration, queue: 'end', afterFinish: function(){	myLightbox.updateDetails(); } });

        // effect on slices
        var i = 0;
        
        // delay is the sum of durations for each slice
        var delay = 0;

        var slice_speed = slice_duration/slices; // 5/4 => 1.25
        
        // var sp_delay = (slice_speed * slice_delay_fraction);
        // var sp = slice_speed + (slice_speed - sp_delay);
        //alert("Slice speed "+ slice_speed*slices + " sp " + ((sp*slices)-slices*sp_delay));
        
        var sp_delay = slice_speed * slice_delay_fraction; // 1.25 * 0.5 => 0.625
        var sp = ( (slice_speed*slices) - (sp_delay*slices) ); // 1.25 + 1.25 - 0.625 => 1.25 + 0.625 => 1.875                        
//        alert(slice_speed  + "  " + sp);
        
        var time = new Date();


	    for(var y=0; y<slice_height; y++){    		    
	        for(var x=0; x<slice_width; x++){	
	            // use dummy j to save current i
	            // hacks the reverse function
	            var j = i;
	            var x2=0;
	            var y2=0;	            
	            if(slice_reverse){
	                i = slices - 1 - i;	                
	                x2 = borderSize +w*(slice_width-1-x);
                    y2 = borderSize +h*(slice_height-1-y);                    
	            }else{
                    x2 = borderSize +w*x;
                    y2 = borderSize +h*y;                    
                }
                
                Element.show('slice_'+i);
		        if(i == (slice_reverse ? 0: slices-1 )){
		            //append final animation for navi bar to last slice element
			        new Effect.Move ('slice_'+i,{ 
			                x: x2, 
			                y: y2, 
			                mode: 'absolute', 
			                delay: delay, 
			                duration: sp,  
			                transition:slice_transition, 
			                afterFinish: function(){
		            	    myLightbox.updateDetails(); 
			        } });
		        }else{
			        new Effect.Move ('slice_'+i,{ 
			            x: x2, 
			            y: y2, 
			            mode: 'absolute', 
			            delay: delay, 
			            duration: sp,  
			            transition:slice_transition
			        });
		        }
		        
                if(slice_use_alphafade){
                    Element.setOpacity('slice_'+i, slice_alpha_begin);
                    new Effect.Opacity('slice_'+i, {duration:slice_speed, from:slice_alpha_begin, to:slice_alpha_end, delay: delay+slice_alpha_delay});                 
                }                
		        delay = delay + sp_delay; // increase delay
		        // hack back the reverse fuction
		        i = j;
	            i++; // increase slice counter                    
		    }
	    }
		this.preloadNeighborImages();
	},
		
	sliceImage: function(){
		var imgElement = $('lightboxImage');		
		var parent = imgElement.parentNode;
        // new prototype version uses Element.cumulativeOffset
        var parent_x = Position.cumulativeOffset( parent )[0] + 20;
        var parent_y = Position.cumulativeOffset( parent )[1] + 20;

        
	    // set properties
	    var size = new Image();
        size.src = imgElement.src;
	    
	    var h = Math.round(size.height/slice_height);            
	    var w = Math.round(size.width/slice_width);    
	    	
	    var i = 0;

    		for(var y=0; y<slice_height; y++){    		    
    		    		for(var x=0; x<slice_width; x++){
		        var slice = $('slice_'+i);
		        var slice_image = $('slice_img_'+i);
		        if(slice == null){
		            // create slice elements
                    slice = document.createElement("div");
    		        slice.setAttribute('id','slice_'+i);		
    		        slice_image = document.createElement("img");
        		    slice_image.setAttribute('id','slice_img_'+i);
    		        slice.appendChild(slice_image);	
                    Element.makeClipping(slice);
                
                    // position image under mask to slice position
                    var top = -(h*y);
                    var left = -(w*x);                    
                    Element.setStyle(slice_image, {position: 'relative', top: top+'px', left: left+'px'});                
                    
    		        // add to parent
                    parent.insertBefore(slice, imgElement);		                    
		        }
		        
		        i++;
		        
		        // set image
                slice_image.setAttribute('src',imgElement.src);

                

                var slice_top = borderSize+parent_y + (h*y);
                var slice_left = borderSize+parent_x + (w*x);         
                           
                var size = new Image();
                size.src = imgElement.src;        	               
                var np = slice_pos(slice_left, slice_top, parent_x, parent_y, size.width, size.height);
                // set position
                var top  = np[1];//-( parent_y + h * (y+1));
                var left = np[0];//w*(x);//-( parent_x + w * (x+1));

                Element.setStyle(slice, {
                    position: 'absolute', 
                    top: top+'px', 
                    left: left+'px',
                    height: h+'px',
                    width: w+'px'
                });                
            
            // if(slice_equal_move){                
            //     Element.setStyle(slice, {position: 'relative', top: '-'+(top_pos+h*(slices + i))+'px', height: h+'px'});                
            // }else{
            //     Element.setStyle(slice, {position: 'relative', top: '-'+(top_pos+h*(i+1))+'px', height: h+'px'});                
            // }            
            
                     
            // hide slice
                Element.hide(slice);
		    }
	    }
	},

	//
	//	updateDetails()
	//	Display caption, image number, and bottom nav.
	//
	updateDetails: function() {
	
		// if caption is not null
		if(imageArray[activeImage][1]){
			Element.show('caption');
			Element.setInnerHTML( 'caption', imageArray[activeImage][1]);
		}
		
		// if image is part of set display 'Image x of x' 
		if(imageArray.length > 1){
			Element.show('numberDisplay');
			Element.setInnerHTML( 'numberDisplay', "Image " + eval(activeImage + 1) + " of " + imageArray.length);
		}

		new Effect.Parallel(
			[ new Effect.SlideDown( 'imageDataContainer', { sync: true, duration: resizeDuration, from: 0.0, to: 1.0 }), 
			  new Effect.Appear('imageDataContainer', { sync: true, duration: resizeDuration }) ], 
			{ duration: resizeDuration, afterFinish: function() {
				// update overlay size and update nav
				var arrayPageSize = getPageSize();
				Element.setHeight('overlay', arrayPageSize[1]);
				myLightbox.updateNav();
				}
			} 
		);
	},

	//
	//	updateNav()
	//	Display appropriate previous and next hover navigation.
	//
	updateNav: function() {

		Element.show('hoverNav');				

		// if not first image in set, display prev image button
		if(activeImage != 0){
			Element.show('prevLink');
			document.getElementById('prevLink').onclick = function() {
				myLightbox.changeImage(activeImage - 1); return false;
			}
		}

		// if not last image in set, display next image button
		if(activeImage != (imageArray.length - 1)){
			Element.show('nextLink');
			document.getElementById('nextLink').onclick = function() {
				myLightbox.changeImage(activeImage + 1); return false;
			}
		}
		
		this.enableKeyboardNav();
	},

	//
	//	enableKeyboardNav()
	//
	enableKeyboardNav: function() {
		document.onkeydown = this.keyboardAction; 
	},

	//
	//	disableKeyboardNav()
	//
	disableKeyboardNav: function() {
		document.onkeydown = '';
	},

	//
	//	keyboardAction()
	//
	keyboardAction: function(e) {
		if (e == null) { // ie
			keycode = event.keyCode;
			escapeKey = 27;
		} else { // mozilla
			keycode = e.keyCode;
			escapeKey = e.DOM_VK_ESCAPE;
		}

		key = String.fromCharCode(keycode).toLowerCase();
		
		if((key == 'x') || (key == 'o') || (key == 'c') || (keycode == escapeKey)){	// close lightbox
			myLightbox.end();
		} else if((key == 'p') || (keycode == 37)){	// display previous image
			if(activeImage != 0){
				myLightbox.disableKeyboardNav();
				myLightbox.changeImage(activeImage - 1);
			}
		} else if((key == 'n') || (keycode == 39)){	// display next image
			if(activeImage != (imageArray.length - 1)){
				myLightbox.disableKeyboardNav();
				myLightbox.changeImage(activeImage + 1);
			}
		}

	},

	//
	//	preloadNeighborImages()
	//	Preload previous and next images.
	//
	preloadNeighborImages: function(){

		if((imageArray.length - 1) > activeImage){
			preloadNextImage = new Image();
			preloadNextImage.src = imageArray[activeImage + 1][0];
		}
		if(activeImage > 0){
			preloadPrevImage = new Image();
			preloadPrevImage.src = imageArray[activeImage - 1][0];
		}
	
	},

	//
	//	end()
	//
	end: function() {
		this.disableKeyboardNav();
		Element.hide('lightbox');
		for(var i=0; i<slices; i++){
            Element.hide('slice_'+i);
        }

		new Effect.Fade('overlay', { duration: overlayDuration});
		showSelectBoxes();
		showFlash();
		
		// enable global scrolling again
    	document.body.style.overflow="visible";
        
	}
}

// -----------------------------------------------------------------------------------

//
// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.com
//
function getPageScroll(){

	var xScroll, yScroll;

	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
		xScroll = self.pageXOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
		xScroll = document.documentElement.scrollLeft;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
		xScroll = document.body.scrollLeft;	
	}

	arrayPageScroll = new Array(xScroll,yScroll) 
	return arrayPageScroll;
}

// -----------------------------------------------------------------------------------

//
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.com
// Edit for Firefox by pHaez
//
function getPageSize(){
	
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = window.innerWidth + window.scrollMaxX;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;
	
//	console.log(self.innerWidth);
//	console.log(document.documentElement.clientWidth);

	if (self.innerHeight) {	// all except Explorer
		if(document.documentElement.clientWidth){
			windowWidth = document.documentElement.clientWidth; 
		} else {
			windowWidth = self.innerWidth;
		}
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

//	console.log("xScroll " + xScroll)
//	console.log("windowWidth " + windowWidth)

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = xScroll;		
	} else {
		pageWidth = windowWidth;
	}
//	console.log("pageWidth " + pageWidth)

	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}

// -----------------------------------------------------------------------------------

//
// getKey(key)
// Gets keycode. If 'x' is pressed then it hides the lightbox.
//
function getKey(e){
	if (e == null) { // ie
		keycode = event.keyCode;
	} else { // mozilla
		keycode = e.which;
	}
	key = String.fromCharCode(keycode).toLowerCase();
	
	if(key == 'x'){
	}
}

// -----------------------------------------------------------------------------------

//
// listenKey()
//
function listenKey () {	document.onkeypress = getKey; }
	
// ---------------------------------------------------

function showSelectBoxes(){
	var selects = document.getElementsByTagName("select");
	for (i = 0; i != selects.length; i++) {
		selects[i].style.visibility = "visible";
	}
}

// ---------------------------------------------------

function hideSelectBoxes(){
	var selects = document.getElementsByTagName("select");
	for (i = 0; i != selects.length; i++) {
		selects[i].style.visibility = "hidden";
	}
}

// ---------------------------------------------------

function showFlash(){
	var flashObjects = document.getElementsByTagName("object");
	for (i = 0; i < flashObjects.length; i++) {
		flashObjects[i].style.visibility = "visible";
	}

	var flashEmbeds = document.getElementsByTagName("embed");
	for (i = 0; i < flashEmbeds.length; i++) {
		flashEmbeds[i].style.visibility = "visible";
	}
}

// ---------------------------------------------------

function hideFlash(){
	var flashObjects = document.getElementsByTagName("object");
	for (i = 0; i < flashObjects.length; i++) {
		flashObjects[i].style.visibility = "hidden";
	}

	var flashEmbeds = document.getElementsByTagName("embed");
	for (i = 0; i < flashEmbeds.length; i++) {
		flashEmbeds[i].style.visibility = "hidden";
	}

}


// ---------------------------------------------------

//
// pause(numberMillis)
// Pauses code execution for specified time. Uses busy code, not good.
// Help from Ran Bar-On [ran2103@gmail.com]
//

function pause(ms){
	var date = new Date();
	curDate = null;
	do{var curDate = new Date();}
	while( curDate - date < ms);
}
/*
function pause(numberMillis) {
	var curently = new Date().getTime() + sender;
	while (new Date().getTime();	
}
*/
// ---------------------------------------------------



function initLightbox() { myLightbox = new Lightbox(); }
Event.observe(window, 'load', initLightbox, false);