/*************************** Optimized for SHOWIT - Gallery by M. Jansen aka. brainstorm84 ***************************/
//
// Einstellungen
//

// Load- und Close-Icon
var loadingImage = 'style/loading.gif';	// WICHTIG!!! hier den Pfad zur Datei richtig setzen (von der SHOWPICORG.PHP aus)	
var closeButton = 'style/close.gif'; // WICHTIG!!! hier den Pfad zur Datei richtig setzen (von der SHOWPICORG.PHP aus)

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

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) { // IE
		keycode = event.keyCode;
	} else { // Mozilla
		keycode = e.which;
	}
	
	key = String.fromCharCode(keycode).toLowerCase();
	
	if (key == 'x') {
		hideLightbox(); 
	}
}

function getPageScroll() 
{
	var yScroll;
	if (parent.pageYOffset) {
		yScroll = parent.pageYOffset;
	} else if (parent.document.documentElement && parent.document.documentElement.scrollTop) { // IE 6
		yScroll = parent.document.documentElement.scrollTop;
	} else if (parent.document.body) { // alle anderen Browser
		yScroll = parent.document.body.scrollTop;
	}

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

function getPageSize() 
{	
	var xScroll, yScroll;
	
	if (parent.window.innerHeight && parent.window.scrollMaxY) {	
		xScroll = parent.document.body.scrollWidth;
		yScroll = parent.window.innerHeight + parent.window.scrollMaxY;
	} else if (parent.document.body.scrollHeight > parent.document.body.offsetHeight){ // Alle außer Mac Explorer
		xScroll = parent.document.body.scrollWidth;
		yScroll = parent.document.body.scrollHeight;
	} else {
		xScroll = parent.document.body.offsetWidth;
		yScroll = parent.document.body.offsetHeight;
	}

	var windowWidth, windowHeight;
	
	if (parent.innerHeight) {
		windowWidth = parent.innerWidth;
		windowHeight = parent.innerHeight;
	} else if (parent.document.documentElement && parent.document.documentElement.clientHeight) {
		windowWidth = parent.document.documentElement.clientWidth;
		windowHeight = parent.document.documentElement.clientHeight;
	} else if (parent.document.body) {
		windowWidth = parent.document.body.clientWidth;
		windowHeight = parent.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 showLightbox(objLink)
{	
	var objOverlay = parent.document.getElementById('overlay');
	var objLightbox = parent.document.getElementById('lightbox');
	var objCaption = parent.document.getElementById('lightboxCaption');
	var objImage = parent.document.getElementById('lightboxImage');
	var objLoadingImage = parent.document.getElementById('loadingImage');
	var objLightboxDetails = parent.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 = parent.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 = parent.document.getElementById('overlay');
	objLightbox = parent.document.getElementById('lightbox');

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

	selects = parent.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 = parent.document.getElementsByTagName("body").item(0);	
	
	var objOverlay = parent.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 = parent.document.createElement("a");
		objLoadingImageLink.setAttribute('href', '#');
		objLoadingImageLink.onclick = function () {
			hideLightbox();
			return false;
		}
		objOverlay.appendChild(objLoadingImageLink);
		
		var objLoadingImage = parent.document.createElement("img");
		objLoadingImage.src = loadingImage;
		objLoadingImage.setAttribute('id', 'loadingImage');
		objLoadingImage.style.position = 'absolute';
		objLoadingImage.style.zIndex = '150';
		objLoadingImageLink.appendChild(objLoadingImage);

		imgPreloader.onload = function(){};
		return false;
	}

	imgPreloader.src = loadingImage;

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

	var imgPreloadCloseButton = new Image();

	imgPreloadCloseButton.onload = function() {
		
		var objCloseButton = parent.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 = parent.document.createElement("img");
	objImage.setAttribute('id', 'lightboxImage');
	objLink.appendChild(objImage);
	
	var objLightboxDetails = parent.document.createElement("div");
	objLightboxDetails.setAttribute('id', 'lightboxDetails');
	objLightbox.appendChild(objLightboxDetails);

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


	var objKeyboardMsg = parent.document.createElement("div");
	objKeyboardMsg.setAttribute('id', 'keyboardMsg');
	objKeyboardMsg.innerHTML = '<center><small>Kopieren nur mit ausdrücklicher Genehmigung gestattet.</small></center>';
	objLightboxDetails.appendChild(objKeyboardMsg);
}

function addLoadEvent(func)
{	
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
    	window.onload = func;
	} else {
		window.onload = function() {
			oldonload();
			func();
		}
	}
}

addLoadEvent(initLightbox);