/*
Lightbox for text by: Sandy Gonzales

modified from:
Lightbox JS: by Lokesh Dhakar - http://www.huddletogether.com


	Table of Contents
	-----------------
	Configuration
	
	Functions
	- getPageScroll()
	- getPageSize()
	- pause()
	- getKey()
	- listenKey()
	- showLightbox()
	- hideLightbox()
	- initLightbox()
	- addLoadEvent()
	
	Function Calls
	- addLoadEvent(initLightbox)

*/



//
// Configuration
//


var closeButton = '/images/close.gif';		

//
// getPageScroll()
// Returns array with x,y page scroll values.
//  amount of pixels the element has scrolled
// 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 objLightbox = document.getElementById('lightbox');
	var objLightboxTop = document.getElementById('lightboxTop');
	var objLightboxInner = document.getElementById('lightboxInner');
	var objCaption = document.getElementById('lightboxCaption');
	var objHeader = document.getElementById('lightboxHeader');
	var objLightboxBot = document.getElementById('lightboxBot');
	
	
	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();
	
		

		
		
		if(objLink.firstChild){
		    objHeader.style.display = 'block';
		    objHeader.innerHTML = objLink.firstChild.nodeValue;
		}
		else{
		    objHeader.style.display = 'none';
		}
		if(objLink.getAttribute('rel')){
			objCaption.style.display = 'block';
			//objCaption.style.width = imgPreload.width + 'px';
			objCaption.innerHTML = objLink.getAttribute('rel');
		
		} 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);
		} 

		// 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';
		objLightboxTop.style.display = 'block';
		objLightboxBot.style.display = 'block';
		objLightboxInner.style.display = 'block';
		
				var contentCont= document.getElementById('contentContainer');
				
		var lightboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - 300 - objLightbox.clientHeight) / 2);
	
		var lightboxLeft = ((contentCont.clientWidth - 400) / 2);
		
		objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
		objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";
		
		objLightbox.onclick = hideLightbox;
		
		// Check for 'enter' keypress
		listenKey();

}


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

	// hide lightbox and overlay
	//objOverlay.style.display = 'none';
	objLightbox.style.left= '-9000px';

	// 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; }
	if (!document.getElementById('terms')){
	    return;
	}
	var terms = document.getElementById('terms');
	
	var anchors = terms.getElementsByTagName("a");

	// loop through all anchor tags
	for (var i=0; i<anchors.length; i++){
		var anchor = anchors[i];
		
		if (anchor.getAttribute("href")){
			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.getElementById("contentContainer");

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

    //create lightbox
	var objLightbox = document.createElement("div");
	objLightbox.setAttribute('id','lightbox');
	objLightbox.setAttribute('title', 'click to close');
    objLightbox.style.left = "-9000px";
	objLightbox.style.position = 'absolute';
	objLightbox.style.zIndex = '100';	
	objBody.appendChild(objLightbox);
	
	//create lightboxtop rounded corners
	var objLightboxTop = document.createElement("div");
	objLightboxTop.setAttribute('id', 'lightboxTop');

	objLightbox.appendChild(objLightboxTop);
	
	var objLightboxMid = document.createElement("div");
	objLightboxMid.setAttribute('id', 'lightboxMid');
    objLightbox.appendChild(objLightboxMid);	

	var objLightboxInner = document.createElement('div');
	objLightboxInner.setAttribute('id', 'lightboxInner')

	objLightboxMid.appendChild(objLightboxInner)
	
	// create link
	var objLink = document.createElement("a");
	objLink.setAttribute('href','#');
	objLink.setAttribute('title','Click to close');
	objLink.onclick = function () {hideLightbox(); return false;}
	objLightboxInner.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;
    
    var objHeader = document.createElement("div");
    objHeader.setAttribute('id', 'lightboxHeader');
  
    objLightboxInner.appendChild(objHeader);
    
	// create caption
	var objCaption = document.createElement("div");
	objCaption.setAttribute('id','lightboxCaption');
	
	objLightboxInner.appendChild(objCaption);
	
	//create lightboxtop rounded corners
	var objLightboxBot = document.createElement("div");
	objLightboxBot.setAttribute('id', 'lightboxBot');
	
	objLightbox.appendChild(objLightboxBot);
	

	// create keyboard message
	//var objKeyboardMsg = document.createElement("div");
	//objKeyboardMsg.setAttribute('id','keyboardMsg');
	//objKeyboardMsg.innerHTML = 'press <a href="#" onclick="hideLightbox(); return false;"><kbd>x</kbd></a> to close';
	//objLightboxDetails.appendChild(objKeyboardMsg);


}



addLoadEvent(initLightbox);	// run initLightbox onLoad