//
// Configuration
//

// If you would like to use a custom loading image or close button reference them in the next two lines.
var loadingImage = 'img/lightbox/loading.gif';		
var closeButton = 'img/lightbox/close.gif';		





//
// getPageScroll()		
// Returns array with x,y page scroll values.
// Core code from - quirksmode.org
//
function getPageScroll(){
	// alert(navigator.appVersion +" *-* "+ navigator.appName +" *-* "+ navigator.userAgent);

	

	// alert(navigator.appName);
	// alert(navigator.userAgent);	
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) {	 // firefox
		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;
		/*
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;	
		*/	
	}
			 	 
/*
if (navigator.appVersion.indexOf("Mac")!=-1 && navigator.appName.indexOf("Expl")!=-1){
	alert("MAX E EXPL");

	}
*/
//alert (document.body.scrollWidth+" - "+ document.body.scrollHeight);

	
		var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		//alert ("qui");
		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;
		// alert (windowWidth +"-"+ windowHeight);
	}	
	
	// 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) 
	// alert (arrayPageSize);
	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.
//imgPreload.onload=function(){
function showLightbox(objLink){
	
	//alert(objLink.href)
	// prep objects
	
	var objOverlay = document.getElementById('overlay');
	var objLightbox = document.getElementById('lightbox');
	var objCaption = document.getElementById('lightboxCaption');
	var objImage = document.getElementById('lightboxImage');
	// setto il src dell'immagine zoomata
	objImage.src=objLink.href;
	
	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');
	if (navigator.appVersion.indexOf("Mac")!=-1 && navigator.appName.indexOf("Expl")!=-1){
		objOverlay.style.display = 'none';
	} else {
			objOverlay.style.display = 'block';
	}


	// preload image
	imgPreload = new Image();
	
	imgPreload.onload=function(){
		//objImage.src = objLink.href;
		//objLightbox.style.display="block";
		
		var widthPreload;
		var heightPreload;
	
		widthPreload = (!imgPreload.width)?0:imgPreload.width ;
		heightPreload = (!imgPreload.height)?0:imgPreload.height;
		var lightboxTop; 
		var lightboxLeft;
        
	//	alert(widthPreload+"***"+heightPreload)
     
        /*
        
        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";
        
        */
        
        
        
		// 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);
		// ok var lightboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - 35 - heightPreload) / 2);
		// ok var lightboxLeft = ((arrayPageSize[0] - 20 - widthPreload)/2);
		
		if(navigator.appVersion.indexOf("Mac")!=-1 && (navigator.appName.indexOf("Expl")!=-1 || navigator.appVersion.indexOf("Safari")!=-1 )){
				
				 lightboxTop = arrayPageScroll[1] ; 
				 lightboxLeft = 0;		
		
		} else {
			
				 lightboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - 35 - heightPreload) / 2);
				 lightboxLeft = ((arrayPageSize[0] - 20 - widthPreload)/2);
			
		}
		
	objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
	objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";
		
		if (navigator.appVersion.indexOf("Mac")!=-1 && navigator.appName.indexOf("Expl")!=-1){
			objLightbox.style.width = 1 + "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";
        }

		//alert(objImage.src);
		
		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;
	}
	
	//ok imgPreload.src = objLink.href;
	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;}
		}
	}

	
	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','');
	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
	// 	qui qui 
	var objImage = document.createElement("img");
	//var objImage = new Image();
	objImage.setAttribute('id','lightboxImage');
	
	objLink.appendChild(objImage);
	
	/*
	for (p in objImage){
			document.write("<br>"+p);
		
		}
	*/
	// 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);

	


}




//
// 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);

//window.onload=initLightbox;	// run initLightbox onLoad

/*window.onload=pippo;
function pippo(){
		alert("ciao");
	}*/
/*
for (p in window){
		document.write(p+"<br>");
	}
*/	
/*function pippo(){
			var test= new Image();
			test.src="img/training/training_big.jpg";
			for (p in test){
					document.write(p+"<br>")
				}
				 
	}
	
	
function pluto(){
			if (navigator.appVersion.indexOf("safari")!=-1){
				
			alert("safari")
				 } else {
					 alert("no");
					 }
	}	*/