//--------------------------------------------------------------------------------------------------
// Author: Michael Falatine || Authors email: 4thorder@4thorder.us
//---------------------------------------------------------------------------------------------------
// Image Viewer Dimensions settings (pixels):
	var InterFaceWidth 			= 252; 			// Set [Overall] WIDTH |||| minimum length=300
	var ViewingAreaHeight		= 68; 			// Set [Viewing area] HEIGHT |||| minimum length=10
// Image Alignment
	var ImageValignment		= 'middle'; 		// Set verticle alignment within viewer (options: top, bottom. middle)
var ImageArray = new Array
(
'',
'symp1.jpg', 
'symp2.jpg',
'symp3.jpg', 
'symp4.jpg'
)
//--------------------------------------------------------------------------------------------------
//window.onload=InitializePage;
/*
function InitializePage()
{
// Install Image Viewer HTML file name holderInput element
//FirstDIV=document.createElement('DIV')
//FirstDIV.id='FirstDIV';
//document.body.appendChild(FirstDIV)

document.getElementById('FirstDIV').innerHTML="<INPUT type=hidden id=fileNameHolder>"+
"<a href=\"javascript://\" onclick=\"moveLeft()\"><img src=\"left_arrow.gif\" border=\"0\" alt=\"left\" id=\"leftBtn\" style=\"position:relative; top:1px;\" /></a><DIV id='interface'>" + 
"	<DIV id='controls'>" + 
"	<DIV id='ViewingArea'>" + 
"	<TABLE border='0' cellpadding='1' cellspacing='0'>" + 
"		<TR id='ImageContainer'>" + 
"		</TR>" + 
"	</TABLE>" + 
"	</DIV>" + 
"	</DIV>" + 
"<a href=\"javascript://\" onclick=\"moveRight()\"><img src=\"right_arrow.gif\" border=\"0\" alt=\"right\" id=\"rightBtn\" /></a></DIV>"              
if (ImageArray!=null)
	{for (l=1; l<ImageArray.length; l++)
		{
		TDElement=document.createElement("TD");
		TDElement.innerHTML="<a href='/img/_en/_ca/event/gallery_symp/large/"+(ImageArray[l])+"' class='thumb' title='Image&nbsp;"+l+" of 4' rel='lightbox'><IMG border='0' src='/img/_en/_ca/event/gallery_symp/thumbs/"+ImageArray[l]+"'></a>"
		document.getElementById('ImageContainer').appendChild(TDElement)		
		}
	}

setStyles();
setIDs();
attachEventhandlers();
}

function setStyles()
{
// set Image Scroller DIVs width Dimensions and position type
document.getElementById('interface').style.position="absolute";
document.getElementById('interface').style.width=InterFaceWidth+"px";
document.getElementById('interface').style.overflow="hidden";

DIVCol=document.getElementById('interface').getElementsByTagName('DIV');
if (DIVCol!=null)
	{for (p=0; p<DIVCol.length; p++)
		{
		DIVCol.item(p).style.position="absolute";
		DIVCol.item(p).style.width=InterFaceWidth+"px";
		if(DIVCol.item(p).id=="ScrollRight")
			{
			DIVCol.item(p).style.width=InterFaceWidth-40+"px";
			DIVCol.item(p).style.textAlign="right";
			}
		}
	}

// set z-index
document.getElementById('interface').style.zIndex=1;
document.getElementById('ViewingArea').style.zIndex=2;
document.getElementById('controls').style.zIndex=2;
// set positions (left)
document.getElementById('ViewingArea').style.left=0+"px";
// set positions (top)
document.getElementById('ViewingArea').style.top=0+"px";
// set Image Scroller DIVs height Dimensions
document.getElementById('ViewingArea').style.height=ViewingAreaHeight+"px";
// Set Viewer Page position

// Table Cell Styles
TDCol=document.getElementById('interface').getElementsByTagName('TD');
if (TDCol!=null)
	{for (td=0; td<TDCol.length; td++)
		{TDCol.item(td).style.verticalAlign=ImageValignment;
		TDCol.item(td).style.verticalAlign=ImageValignment;}}
}


// ::::::::::::::::::::::::
// ::: Event Handlers ::
// ::::::::::::::::::::::::

function onclickHandler(e)
{
// Browser compatibility code
	var targ;
	if (!e){var e = window.event;}
	
	if (e.target)
		{	targ = e.target;
			var xpos=(e.pageX); var ypos=(e.pageY);}
	
	else if (e.srcElement)
		{	var xpos=(event.x);	var ypos=(event.y);
			targ = e.srcElement;}

// Strip file name from image src
	var spath=targ.getAttribute('src');
	wholePathLength=spath.length;
	strippedPathLength=spath.substring(0,spath.lastIndexOf("/")).length;
	ifm= spath.substring(strippedPathLength+1,wholePathLength);
// Store file name in holder for use by popup windoow
	document.getElementById('fileNameHolder').value=ifm;
// Open the window at location of thumbnail image
	var pos = "left="+xpos+",top="+ypos;
	//window.open("imageViewerPopup.htm","imageWindow","width=18,height=18,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,"+pos);
}

// Attach event handlers to all images within container
function attachEventhandlers()
{
ContainerElement=document.getElementById('ImageContainer')
TDCol=ContainerElement.getElementsByTagName('TD');

if (TDCol!=null)
	{for (l=0; l<TDCol.length; l++)
		{
		IMGCol=TDCol.item(l).getElementsByTagName("IMG");
		IMGCol.item(0).style.cursor="pointer"
		IMGCol.item(0).setAttribute('id',"Image"+l)
		IMGCol.item(0).onclick=onclickHandler;
		}
	}
}

// Set ID's for all table cells
function setIDs()
{
ContainerElement=document.getElementById('ImageContainer')
TDCol=ContainerElement.getElementsByTagName('TD');
if (TDCol!=null)
	{	for (i=0; i<TDCol.length; i++)
			{TDCol.item(i).setAttribute('id',i)}
	}
}

// :::::::::::::::::::::::::
// ::: Scroll Functions ::
// :::::::::::::::::::::::::

function moveLeft()
{
ContainerElement=document.getElementById("ImageContainer");
firstTD=document.getElementById("0");
dupfirstTD=firstTD.cloneNode(false)
dupfirstTD.innerHTML=firstTD.innerHTML
ContainerElement.removeChild(firstTD);
ContainerElement.appendChild(dupfirstTD);
setStyles; setIDs();attachEventhandlers();
}

function moveRight()
{
lastTD=document.getElementById(TDCol.length-1);
duplastTD=lastTD.cloneNode(false)
duplastTD.innerHTML=lastTD.innerHTML
firstTD=document.getElementById("0");
ContainerElement=document.getElementById("ImageContainer");
ContainerElement.insertBefore(duplastTD,firstTD);
ContainerElement.removeChild(lastTD);
setStyles; setIDs();attachEventhandlers();
}

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

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

	Script featured on Dynamic Drive code library Jan 24th, 06':
	http://www.dynamicdrive.com

	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
	(basically, do anything you want, just leave my name and link)
	
	Table of Contents
	-----------------
	Configuration
	
	Functions
	- getPageScroll()
	- getPageSize()
	- pause()
	- getKey()
	- listenKey()
	- showLightbox()
	- hideLightbox()
	- initLightbox()
	- addLoadEvent()
	
	Function Calls
	- addLoadEvent(initLightbox)

*/



//
// Configuration
//

// If you would like to use a custom loading image or close button reference them in the next two lines.
var loadingImage = 'loading.gif';		
var closeButton = '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 { // Explorer Mac...would also work in Explorer 6 Strict, 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'; }
		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';
	
	// 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 = '<a href="javascript://" onclick="hideLightbox();"><img src="close.gif" border="0" alt="Close" /></a>';
	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(InitializePage);
//addLoadEvent(initLightbox);	// run initLightbox onLoad