/*
	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 closeButton = 'ReadySkins/common/images/close.gif';		


//
// 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.
//

var objLink;
function showLightbox(href,html){
	href = (href||"").replace(/\&/g,"&");
		
	// prep objects
	var objOverlay = document.getElementById('overlay');
	var objLoadingImage = document.getElementById('loadingImage');
	var myFrameConteiner = document.getElementById('frameConteiner');
	
	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';
	}
	
	// !!! questo perche' con il css IE7 va in palla attravers lo stile
	changeOpac(80, objOverlay.id);
	
	// set height of Overlay to take up whole page and show
	objOverlay.style.height = (arrayPageSize[1] + 'px');
	objOverlay.style.display = 'block';
	
	// openMyPopUp(600,400) !!!! ho tolto il ridimensionamento dei vari pop up a parte i video.
	// ora e' fisso qui x l'iframe e per e per l'html
	// vedere se passarmi le dimensioni nell'url da aprire o nell'html
	if(href)
		myFrameConteiner.innerHTML = '<iframe src="'+href+'" name="lightboxImage" id="lightboxImage" marginwidth="0" marginheight="0" frameborder="0" onload="openMyPopUp(600,400);"></iframe>';
	else if(html){
		myFrameConteiner.innerHTML = '<div id="lightboxImage">'+html+'</div>';
		setTimeout("openMyPopUp(500,300);",500);
	}
}

function openMyPopUp(w,h){
	if(window.lightBoxOpen)
		return;
	
	var objOverlay = document.getElementById('overlay');
	var objLightbox = document.getElementById('lightbox');
	var objImage = document.getElementById('lightboxImage');
	var objLoadingImage = document.getElementById('loadingImage');
	var objCaption = document.getElementById('lightboxCaption');
	var objLightboxDetails = document.getElementById('lightboxDetails');
	
	var width = (w>>0)||500;
	var height = (h>>0)||500;
		width += 50;
		height += 50;
	
	objImage.width = width;
	objImage.height = height;
	
	// 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 - height) / 2);
	var lightboxLeft = ((arrayPageSize[0] - 20 - width) / 2);
	
	objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
	objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";

	objLightboxDetails.style.width = width + 'px';
	
	// 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();
	
	window.lightBoxOpen = true;
	return false;
}

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

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

	// 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 = '';
	
	window.lightBoxOpen = false;
	if( window.refresh ){// viene settata dall'iframe
		showLoadingBox();// per l'attesa..
		if(typeof(window.refresh)=="string"){
			window.refresh = window.refresh.replace(/\&amp;/g,"&");
			window.location.replace(window.refresh);
		}else
			window.location.reload();
	}
}


//
// 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.href); 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="#" id="lightBoxLink" onclick="hideLightbox(); return false;" title="Click anywhere to close">
	//			<img id="closeButton" />		
	//		</a>
	//		<div id="frameConteiner">
	//			<iframe id="lightboxImage" />
	//		</div>
	//		<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.zIndex = '90';
	objOverlay.style.top = '0';
	objOverlay.style.left = '0';
 	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 objLightBoxLink = document.createElement("a");
	objLightBoxLink.setAttribute('id','lightBoxLink');
	objLightBoxLink.setAttribute('href','#');
	objLightBoxLink.setAttribute('title','Click to close');
	objLightBoxLink.style.zIndex = '200';
	objLightBoxLink.onclick = function () {hideLightbox(); return false;}
	objLightbox.appendChild(objLightBoxLink);
	
	// create frame conteiner
	var myFrameConteiner = document.createElement("div");
	myFrameConteiner.setAttribute('id','frameConteiner');
	objLightbox.appendChild(myFrameConteiner);

	// 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';
		objLightBoxLink.appendChild(objCloseButton);

		return false;
	}

	imgPreloadCloseButton.src = closeButton;

	// 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="#" onclick="hideLightbox(); return false;">close</a>]';
	objLightboxDetails.appendChild(objKeyboardMsg);
}