var loadingImage = 'imagini/tcd_se_incarca.gif';
var closeButton = 'imagini/close.gif';

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) {
                yScroll = document.body.scrollTop;
        }

        arrayPageScroll = new Array('',yScroll) 
        return arrayPageScroll;
}

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 {
                xScroll = document.body.offsetWidth;
                yScroll = document.body.offsetHeight;
        }
        
        var windowWidth, windowHeight;
        if (self.innerHeight) {
                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) {
                windowWidth = document.body.clientWidth;
                windowHeight = document.body.clientHeight;
        }        
        
        if(yScroll < windowHeight){
                pageHeight = windowHeight;
        } else { 
                pageHeight = yScroll;
        }

        if(xScroll < windowWidth){
                pageWidth = windowWidth;
        } else {
                pageWidth = xScroll;
        }


        arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
        return arrayPageSize;
}

function pause(numberMillis) {
        var now = new Date();
        var exitTime = now.getTime() + numberMillis;
        while (true) {
                now = new Date();
                if (now.getTime() > exitTime)
                        return;
        }
}

function getKey(e){
        if (e == null) {
                keycode = event.keyCode;
        } else {
                keycode = e.which;
        }
        key = String.fromCharCode(keycode).toLowerCase();
        
        if(key == 'x'){ hideLightbox(); }
}

function listenKey () {        document.onkeypress = getKey; }

function showLightbox(objLink)
{
        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();

        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';
        }

        objOverlay.style.height = (arrayPageSize[1] + 'px');
        objOverlay.style.display = 'block';

        imgPreload = new Image();

        imgPreload.onload=function(){
                objImage.src = objLink.href;

                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.innerHTML = objLink.getAttribute('title');
                } else {
                        objCaption.style.display = 'none';
                }

                if (navigator.appVersion.indexOf("MSIE")!=-1){
                        pause(250);
                } 

                if (objLoadingImage) {        objLoadingImage.style.display = 'none'; }

                selects = document.getElementsByTagName("select");
                for (i = 0; i != selects.length; i++) {
                        selects[i].style.visibility = "hidden";
                }

                objLightbox.style.display = 'block';

                arrayPageSize = getPageSize();
                objOverlay.style.height = (arrayPageSize[1] + 'px');

                listenKey();

                return false;
        }

        imgPreload.src = objLink.href;
        
}

function hideLightbox()
{

        objOverlay = document.getElementById('overlay');
        objLightbox = document.getElementById('lightbox');

        objOverlay.style.display = 'none';
        objLightbox.style.display = 'none';

        selects = document.getElementsByTagName("select");
        for (i = 0; i != selects.length; i++) {
                selects[i].style.visibility = "visible";
        }

        document.onkeypress = '';
}

function initLightbox()
{

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

        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);

        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();

        var imgPreloader = new Image();

        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 = '0';
                objLoadingImageLink.appendChild(objLoadingImage);

                imgPreloader.onload=function(){};

                return false;
        }

        imgPreloader.src = loadingImage;

        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);

        var objLink = document.createElement("a");
        objLink.setAttribute('href','#');
        //objLink.setAttribute('title','Click pentru a inchide');
        objLink.onclick = function () {hideLightbox(); return false;}
        objLightbox.appendChild(objLink);

        var imgPreloadCloseButton = new Image();

        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 objImage = document.createElement("img");
        objImage.setAttribute('id','lightboxImage');
        objLink.appendChild(objImage);

        var objLightboxDetails = document.createElement("div");
        objLightboxDetails.setAttribute('id','lightboxDetails');
        objLightbox.appendChild(objLightboxDetails);

        var objCaption = document.createElement("div");
        objCaption.setAttribute('id','lightboxCaption');
        objCaption.style.display = 'none';
        objLightboxDetails.appendChild(objCaption);

        if(document.getElementById('divImgalArray'))
        {
        var objImgalArray = document.createElement("div");
        objImgalArray.setAttribute('id','ImgalArray');
        objImgalArray.innerHTML = document.getElementById('divImgalArray').innerHTML;
        objLightboxDetails.appendChild(objImgalArray);
        }
        
}

addLoadEvent(initLightbox);