/*



	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/



	(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 = 'http://www.rhinogymflooring.com/media/gallery/loading.gif';		



var closeButton = 'http://www.rhinogymflooring.com/media/gallery/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'; }







		// 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');



	



	// THIS PLACES THE MESSAGE TO CLOSE IN THE LOWER PORTION OF THE LIGHTBOX ---------- Jim Pearce



	//objKeyboardMsg.innerHTML = 'press <a href="#" onclick="hideLightbox(); return false;"><kbd>x</kbd></a> to close';



	



	// OR THIS ONE ---------- Jim Pearce



	



	//objKeyboardMsg.innerHTML = '<B><font size=1 family=verdana>CLICK THE IMAGE TO CLOSE</font></B>';



	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