// Lightbox 1.6, Extended version of Slimbox with some fixes for Mootools 1.2 by Aeron Glemann. Copyright (c) 2007 Samuel Birch <http://phatfusion.net>, MIT Style License.

/*var Lightbox=new Class({Implements:[Events,Options],options:{resizeDuration:400,resizeTransition:Fx.Transitions.Sine.easeInOut,initialWidth:250,initialHeight:250,animateCaption:{In:true,Out:true},showControls:false,showNumbers:true,descriptions:false,opacity:0.8,onClose:$empty,onOpen:$empty},initialize:function(A){this.setOptions(A);this.options.container=document.body;this.anchors=[];$$("a[rel]").each(function(C){if(C.rel.test(/^lightbox/i)){C.onclick=this.click.pass(C,this);this.anchors.push(C)}},this);this.eventPosition=this.position.bind(this);this.overlay=new Element("div").set("id","lbOverlay").inject(this.options.container);this.center=new Element("div").set("id","lbCenter").setStyles({width:this.options.initialWidth+"px",height:this.options.initialHeight+"px",marginLeft:"-"+(this.options.initialWidth/2)+"px",display:"none"}).inject(this.options.container);this.image=new Element("div").set("id","lbImage").inject(this.center);this.bottomContainer=new Element("div").set("id","lbBottomContainer").setStyle("display","none").inject(this.options.container);this.bottom=new Element("div").set("id","lbBottom").inject(this.bottomContainer);if(this.options.showControls){this.controlDiv=new Element("div").set("id","lbControls").inject(this.bottom)}else{this.controlDiv=this.image}this.prevLink=new Element("a").setProperties({id:"lbPrevLink",href:"#"}).setStyle("display","none").inject(this.controlDiv);this.nextLink=this.prevLink.clone().set("id","lbNextLink").inject(this.controlDiv);this.prevLink.onclick=this.previous.bind(this);this.nextLink.onclick=this.next.bind(this);this.closeButton=new Element("a").setProperties({id:"lbCloseLink",href:"#"}).inject(this.bottom);this.closeButton.onclick=this.overlay.onclick=this.close.bind(this);this.caption=new Element("div").set("id","lbCaption").inject(this.bottom);if(this.options.descriptions!=false){this.options.descriptions=$$(this.options.descriptions);this.description=new Element("div").set("id","lbDescription").inject(this.bottom)}if(this.options.showNumbers){this.number=new Element("div").set("id","lbNumber").inject(this.bottom)}new Element("div").setStyle("clear","both").inject(this.bottom);var B=this.nextEffect.bind(this);this.fx={overlay:new Fx.Tween(this.overlay,"opacity",{duration:500}),resize:new Fx.Morph(this.center,{duration:this.options.resizeDuration,transition:this.options.resizeTransition,onComplete:B}),image:new Fx.Tween(this.image,"opacity",{duration:500,onComplete:B}),bottom:new Fx.Tween(this.bottom,"margin-top",{duration:400,onComplete:B})};this.overlay.fade("hide");this.preloadPrev=new Image();this.preloadNext=new Image();return this},click:function(D){if(this.options.descriptions!=false){this.options.descriptions.each(function(F,E){if(F.hasClass(D.id)){this.linkLoc=E}},this)}if(D.rel.length==8){return this.show(D.href,D.title)}var C,B,A=[];this.anchors.each(function(E){if(E.rel==D.rel){for(C=0;C<A.length;C++){if(A[C][0]==E.href){break}}if(C==A.length){A.push([E.href,E.title]);if(E.href==D.href){B=C}}}},this);return this.open(A,B)},show:function(A,B){return this.open([[A,B]],0)},open:function(A,B){this.images=A;this.position();this.setup(true);this.top=window.getScrollTop()+(window.getHeight()/15);this.window={};this.window.height=window.getScrollHeight();this.window.width=window.getScrollWidth();this.window.top=window.getScrollTop();this.window.left=window.getScrollLeft();this.center.setStyles({top:this.top+"px",display:""});this.overlay.fade(this.options.opacity);this.fireEvent("onOpen");return this.changeImage(B)},position:function(){if(this.options.container==document.body){var B=window.getScrollHeight()+"px";var A=window.getScrollWidth()+"px";this.overlay.setStyles({top:"0px",height:B,width:A})}else{var C=this.options.container.getCoordinates();this.overlay.setStyles({top:C.top+"px",height:C.height+"px",left:C.left+"px",width:C.width+"px"})}},setup:function(A){var C=$A(document.getElementsByTagName("object"));if(window.ie){C.extend(document.getElementsByTagName("select"))}C.each(function(D){D.style.visibility=A?"hidden":""});var B=A?"addEvent":"removeEvent";window[B]("scroll",this.eventPosition)[B]("resize",this.eventPosition);this.step=0},previous:function(){this.linkLoc--;return this.changeImage(this.activeImage-1)},next:function(){this.linkLoc++;return this.changeImage(this.activeImage+1)},changeImage:function(A){if(this.step||(A<0)||(A>=this.images.length)){return false}this.step=1;this.activeImage=A;if(this.options.animateCaption.In&&this.bottom.offsetHeight){this.prevLink.style.display=this.nextLink.style.display="none";this.bottom.set("tween",{duration:300,onComplete:this.loadImage.bind(this)}).tween("margin-top",-this.bottom.offsetHeight)}else{this.bottomContainer.style.display=this.prevLink.style.display=this.nextLink.style.display="none";this.loadImage()}this.image.fade("hide");this.center.className="lbLoading";return false},loadImage:function(){this.preload=new Image();this.preload.onload=this.nextEffect.bind(this);this.preload.src=this.images[this.activeImage][0]},nextEffect:function(){switch(this.step++){case 1:this.center.className="";this.image.style.backgroundImage="url("+this.images[this.activeImage][0]+")";this.image.style.width=this.bottom.style.width=this.preload.width+"px";if(this.options.showControls){this.image.style.height=this.preload.height+"px"}else{this.image.style.height=this.prevLink.style.height=this.nextLink.style.height=this.preload.height+"px"}this.caption.set("html",this.images[this.activeImage][1]||"");if(this.options.descriptions!=false){if(this.description.getFirst()){this.description.getFirst().remove()}var B=this.options.descriptions[this.linkLoc].clone();B.setStyle("display","block").inject(this.description)}if(this.options.showNumbers){this.number.set("html",(this.images.length==1)?"":"Image "+(this.activeImage+1)+" of "+this.images.length)}if(this.activeImage){this.preloadPrev.src=this.images[this.activeImage-1][0]}if(this.activeImage!=(this.images.length-1)){this.preloadNext.src=this.images[this.activeImage+1][0]}if(this.center.clientHeight!=this.image.offsetHeight){this.fx.resize.start({height:this.image.offsetHeight});break}this.step++;case 2:if(this.center.clientWidth!=this.image.offsetWidth){this.fx.resize.start({width:this.image.offsetWidth,marginLeft:-this.image.offsetWidth/2});break}this.step++;case 3:this.bottomContainer.setStyles({top:(this.top+this.center.clientHeight)+"px",height:"0px",marginLeft:this.center.style.marginLeft,display:""});this.image.fade("in");var A=this.caption.getStyle("height").toInt();if(this.options.descriptions!=false){A+=this.description.getStyle("height").toInt()}if(this.options.showControls){A+=this.controlDiv.getStyle("height").toInt()}if(this.options.showNumbers){A+=this.number.getStyle("height").toInt()}var C=(A-(this.closeButton.getStyle("height").toInt()*2));if(C<0){C=0}this.closeButton.setStyle("marginTop",C+"px");if(this.activeImage!=0){this.prevLink.style.display=""}if(this.activeImage!=(this.images.length-1)){this.nextLink.style.display=""}break;case 4:if(this.options.animateCaption.Out){this.fx.bottom.set(-this.bottom.offsetHeight);this.bottomContainer.style.height="";this.fx.bottom.start(0);break}this.bottomContainer.style.height="";case 5:this.step=0}},close:function(){if(this.step<0){return }this.step=-1;if(this.preload){this.preload.onload=$empty;this.preload=null}for(var A in this.fx){this.fx[A].cancel()}this.center.style.display=this.bottomContainer.style.display="none";this.overlay.fade("out");this.setup.pass(false,this);this.overlay.setStyles({height:this.window.height+"px",width:this.window.width+"px"});this.fireEvent("onClose");return false}});

*/

/*
	Lightbox JS: Fullsize Image Overlays 
	by Lokesh Dhakar - http://www.huddletogether.com

	For more information on this script, visit:
	http://huddletogether.com/projects/lightbox/

	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/

*/

var loadingImage = 'images/site/loading.gif';		
var closeButton = 'images/site/icon_close.gif';		


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

	var yScroll;

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

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



//
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.org
// Edit for Firefox by pHaez
//
function getPageSize(){

var xScroll, yScroll;

if (window.innerHeight && window.scrollMaxY) { 
xScroll = document.body.scrollWidth;
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 if (document.documentElement && document.documentElement.scrollHeight > document.documentElement.offsetHeight){ // Explorer 6 strict mode
xScroll = document.documentElement.scrollWidth;
yScroll = document.documentElement.scrollHeight;
} else { // Explorer Mac...would also work in Mozilla and Safari
xScroll = document.body.offsetWidth;
yScroll = document.body.offsetHeight;
}

var windowWidth, windowHeight;
if (self.innerHeight) { // all except Explorer
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;
}

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


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

//
// pause(numberMillis)
// Pauses code execution for specified time. Uses busy code, not good.
// Code from http://www.faqts.com/knowledge_base/view.phtml/aid/1602
//
function pause(numberMillis) {
	var now = new Date();
	var exitTime = now.getTime() + numberMillis;
	while (true) {
		now = new Date();
		if (now.getTime() > exitTime)
			return;
	}
}

//
// 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'){ hideLightbox(); }
}


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

//
// showLightbox()
// Preloads images. Pleaces new image in lightbox then centers and displays.
//
function showLightbox(objLink)
{
	// prep objects
	var objOverlay = document.getElementById('overlay');
	var objLightbox = document.getElementById('lightbox');
	var objCaption = document.getElementById('lightboxCaption');
	var objImage = document.getElementById('lightboxImage');
	var objLoadingImage = document.getElementById('loadingImage');
	var objLightboxDetails = document.getElementById('lightboxDetails');

	
	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();

	// center loadingImage if it exists
	if (objLoadingImage) {
		objLoadingImage.style.top = (arrayPageScroll[1] + ((arrayPageSize[3] - 35 - objLoadingImage.height) / 2) + 'px');
		objLoadingImage.style.left = (((arrayPageSize[0] - 20 - objLoadingImage.width) / 2) + 'px');
		objLoadingImage.style.display = 'block';
	}

	// set height of Overlay to take up whole page and show
	objOverlay.style.height = (arrayPageSize[1] + 'px');
	objOverlay.style.display = 'block';

	// preload image
	imgPreload = new Image();

	imgPreload.onload=function(){
		objImage.src = objLink.href;

		// center lightbox and make sure that the top and left values are not negative
		// and the image placed outside the viewport
		var lightboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - 35 - imgPreload.height) / 2);
		var lightboxLeft = ((arrayPageSize[0] - 20 - imgPreload.width) / 2);
		
		objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
		objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";


		objLightboxDetails.style.width = imgPreload.width + 'px';
		
		if(objLink.getAttribute('title')){
			objCaption.style.display = 'block';
			//objCaption.style.width = imgPreload.width + 'px';
			objCaption.innerHTML = objLink.getAttribute('title');
		} else {
			objCaption.style.display = 'none';
		}
		
		// A small pause between the image loading and displaying is required with IE,
		// this prevents the previous image displaying for a short burst causing flicker.
		if (navigator.appVersion.indexOf("MSIE")!=-1){
			pause(250);
		} 

		if (objLoadingImage) {	objLoadingImage.style.display = 'none'; }

		// Hide select boxes as they will 'peek' through the image in IE
		selects = document.getElementsByTagName("select");
        for (i = 0; i != selects.length; i++) {
                selects[i].style.visibility = "hidden";
        }

	
		objLightbox.style.display = 'block';

		// After image is loaded, update the overlay height as the new image might have
		// increased the overall page height.
		arrayPageSize = getPageSize();
		objOverlay.style.height = (arrayPageSize[1] + 'px');
		
		// Check for 'x' keypress
		listenKey();

		return false;
	}

	imgPreload.src = objLink.href;
	
}





//
// hideLightbox()
//
function hideLightbox()
{
	// get objects
	objOverlay = document.getElementById('overlay');
	objLightbox = document.getElementById('lightbox');

	// hide lightbox and overlay
	objOverlay.style.display = 'none';
	objLightbox.style.display = 'none';

	// make select boxes visible
	selects = document.getElementsByTagName("select");
    for (i = 0; i != selects.length; i++) {
		selects[i].style.visibility = "visible";
	}

	// disable keypress listener
	document.onkeypress = '';
}




//
// initLightbox()
// Function runs on window load, going through link tags looking for rel="lightbox".
// These links receive onclick events that enable the lightbox display for their targets.
// The function also inserts html markup at the top of the page which will be used as a
// container for the overlay pattern and the inline image.
//
function initLightbox()
{
	
	if (!document.getElementsByTagName){ return; }
	var anchors = document.getElementsByTagName("a");

	// loop through all anchor tags
	for (var i=0; i<anchors.length; i++){
		var anchor = anchors[i];

		if (anchor.getAttribute("href") && (anchor.getAttribute("rel") == "lightbox")){
			anchor.onclick = function () {showLightbox(this); return false;}
		}
	}

	// the rest of this code inserts html at the top of the page that looks like this:
	//
	// <div id="overlay">
	//		<a href="#" onclick="hideLightbox(); return false;"><img id="loadingImage" /></a>
	//	</div>
	// <div id="lightbox">
	//		<a href="#" onclick="hideLightbox(); return false;" title="Click anywhere to close image">
	//			<img id="closeButton" />		
	//			<img id="lightboxImage" />
	//		</a>
	//		<div id="lightboxDetails">
	//			<div id="lightboxCaption"></div>
	//			<div id="keyboardMsg"></div>
	//		</div>
	// </div>
	
	var objBody = document.getElementsByTagName("body").item(0);
	
	// create overlay div and hardcode some functional styles (aesthetic styles are in CSS file)
	var objOverlay = document.createElement("div");
	objOverlay.setAttribute('id','overlay');
	objOverlay.onclick = function () {hideLightbox(); return false;}
	objOverlay.style.display = 'none';
	objOverlay.style.position = 'absolute';
	objOverlay.style.top = '0';
	objOverlay.style.left = '0';
	objOverlay.style.zIndex = '90';
 	objOverlay.style.width = '100%';
	objBody.insertBefore(objOverlay, objBody.firstChild);
	
	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();

	// preload and create loader image
	var imgPreloader = new Image();
	
	// if loader image found, create link to hide lightbox and create loadingimage
	imgPreloader.onload=function(){

		var objLoadingImageLink = document.createElement("a");
		objLoadingImageLink.setAttribute('href','#');
		objLoadingImageLink.onclick = function () {hideLightbox(); return false;}
		objOverlay.appendChild(objLoadingImageLink);
		
		var objLoadingImage = document.createElement("img");
		objLoadingImage.src = loadingImage;
		objLoadingImage.setAttribute('id','loadingImage');
		objLoadingImage.style.position = 'absolute';
		objLoadingImage.style.zIndex = '150';
		objLoadingImageLink.appendChild(objLoadingImage);

		imgPreloader.onload=function(){};	//	clear onLoad, as IE will flip out w/animated gifs

		return false;
	}

	imgPreloader.src = loadingImage;

	// create lightbox div, same note about styles as above
	var objLightbox = document.createElement("div");
	objLightbox.setAttribute('id','lightbox');
	objLightbox.style.display = 'none';
	objLightbox.style.position = 'absolute';
	objLightbox.style.zIndex = '100';	
	objBody.insertBefore(objLightbox, objOverlay.nextSibling);
	
	// create link
	var objLink = document.createElement("a");
	objLink.setAttribute('href','#');
	objLink.setAttribute('title','Click to close');
	objLink.onclick = function () {hideLightbox(); return false;}
	objLightbox.appendChild(objLink);

	// preload and create close button image
	var imgPreloadCloseButton = new Image();

	// if close button image found, 
	imgPreloadCloseButton.onload=function(){

		var objCloseButton = document.createElement("img");
		objCloseButton.src = closeButton;
		objCloseButton.setAttribute('id','closeButton');
		objCloseButton.style.position = 'absolute';
		objCloseButton.style.zIndex = '200';
		objLink.appendChild(objCloseButton);

		return false;
	}

	imgPreloadCloseButton.src = closeButton;

	// create image
	var objImage = document.createElement("img");
	objImage.setAttribute('id','lightboxImage');
	objLink.appendChild(objImage);
	
	// create details div, a container for the caption and keyboard message
	var objLightboxDetails = document.createElement("div");
	objLightboxDetails.setAttribute('id','lightboxDetails');
	objLightbox.appendChild(objLightboxDetails);

	// create caption
	var objCaption = document.createElement("div");
	objCaption.setAttribute('id','lightboxCaption');
	objCaption.style.display = 'none';
	objLightboxDetails.appendChild(objCaption);

	// create keyboard message
	var objKeyboardMsg = document.createElement("div");
	objKeyboardMsg.setAttribute('id','keyboardMsg');
	//objKeyboardMsg.innerHTML = 'Back in Action';
	objLightboxDetails.appendChild(objKeyboardMsg);


}




//
// addLoadEvent()
// Adds event to window.onload without overwriting currently assigned onload functions.
// Function found at Simon Willison's weblog - http://simon.incutio.com/
//
function addLoadEvent(func)
{	
	var oldonload = window.onload;
	if (typeof window.onload != 'function'){
    	window.onload = func;
	} else {
		window.onload = function(){
		oldonload();
		func();
		}
	}

}



addLoadEvent(initLightbox);	// run initLightbox onLoad