/*
	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)

*/

var cur_pic;



//
// Configuration
//

// If you would like to use a custom loading image or close button reference them in the next two lines.
// variables delivered from myGallery for correct reference




//
// 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.
//
    var http_request_pic_cache = false;
    var temp_objLink;
    
    function doRequest_pic_cache()
    {
        http_request_pic_cache = false;

        if (window.XMLHttpRequest) // Opera, Mozilla, Safari, Netscape
        {
            http_request_pic_cache = new XMLHttpRequest();
            if (http_request_pic_cache.overrideMimeType)
            {
                http_request_pic_cache.overrideMimeType('text/xml');
            }
        }
        else if (window.ActiveXObject)  // IE
        {
            try
            {
                http_request_pic_cache = new ActiveXObject("Msxml2.XMLHTTP");
            }
            catch (e)
            {
                try
                {
                    http_request_pic_cache = new ActiveXObject("Microsoft.XMLHTTP");
                }
                catch (e) {}
            }
        }
    }

function showLightbox_prepare(pic_info)
{       
    var Woerter = pic_info.split("|");
    
    temp_objLink.href = Woerter[0];
    temp_objLink.rel =  Woerter[1]+"x"+Woerter[2];
    temp_objLink.rev = '';
        //alert(pic_info);
    showLightbox(temp_objLink);
}    
    
function set_pic_cache(objLink)
{
    if (objLink.rev != 'wrap'){
        showLightbox(objLink);
        return;
    }
    
    if ( http_request_pic_cache && !http_request_pic_cache._complete ) http_request_pic_cache.abort(); 
    
    temp_objLink = objLink;    //alert(objLink.href);
    
    doRequest_pic_cache();

    var url = "/ajax_request_pic_cache.php?string="+objLink.href+"&acache="+Math.round(Math.random()*100000);

    if (http_request_pic_cache) {
        http_request_pic_cache.onreadystatechange = function() {
            if ((http_request_pic_cache.readyState == 4) && (http_request_pic_cache.status == 200)) {
                showLightbox_prepare(http_request_pic_cache.responseText); }
        }
            
        http_request_pic_cache.open('GET', url, true);
        http_request_pic_cache.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
        http_request_pic_cache.send(null);
    } else {
        document.getElementById('pcache').src=url+'&iframe=true';
    }
}
    
function showLightbox(objLink)
{
    if ( http_request_pic_cache && !http_request_pic_cache._complete ) http_request_pic_cache.abort();
    
    if ((objLink.getAttribute('id') == "picclick_forward") || (objLink.getAttribute('id') == "picclick_back")); //no cache check
    else {
        if (objLink.rev == 'wrap'){
           // alert("df");
            set_pic_cache(objLink);
            return; 
        } else { //ajax file cache
   
        }
    } 
    
    
	// 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 objBilderKlick = document.getElementById('bilderklick');

	//target width and height
	var parameter = objLink.rel.split("x");       // alert(parameter[0]);


	for (i=0; i < objBilderKlick.childNodes.length; i++)
	{
		tempnode = objBilderKlick.childNodes[i].id;
		//alert(tempnode);
		if ((tempnode != undefined) && (tempnode !="picclick_back")  &&  (tempnode != "picclick_forward") && (tempnode != ""))
		{
			//alert(tempnode);
			document.getElementById(tempnode).style.color = "#000000";
		}


	}
	
	objBilderKlick.style.display = 'none';
	objLightbox.style.display = 'none';

	if(objLink.getAttribute('id') == "picclick_back") 
	{
		temp = parseInt(cur_pic) - 1;
		if (temp == 0) { temp = pic_count; }
		document.getElementById('picclick_'+temp).style.color = "red";
		showLightbox(document.getElementById('picclick_'+temp));
		return;
		//objLink = document.getElementById('picclick_'+cur_pic).cloneNode(true);
	}
	else if(objLink.getAttribute('id') == "picclick_forward")
	{
		temp = parseInt(cur_pic) + 1;
		if (temp > pic_count) { temp = 1; }
		document.getElementById('picclick_'+temp).style.color = "red";
		showLightbox(document.getElementById('picclick_'+temp));
		return;
		//objLink = document.getElementById('picclick_'+cur_pic).cloneNode(true);
	}
	else if(objLink.getAttribute('id'))
	//if (find_substring(objLink.getAttribute('id'), "picclick"))
	{
		cur_pic = objLink.name;
		objLink.style.color = "red";
	}
	else
	{
		cur_pic = objLink.name;
		document.getElementById('picclick_'+objLink.name).style.color = "red";
	}

        //banner wech
    if (document.getElementById('banner_1')) {
        document.getElementById('banner_1').style.display = "none";
    }

    if (document.getElementById('banner_2')) {
        document.getElementById('banner_2').style.display = "none";
    }
	

	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();

	// center loadingImage if it exists
	if (objLoadingImage) {
		objLoadingImage.style.top = (arrayPageScroll[1] + ((arrayPageSize[3] - 35 - parameter[1]) / 2) + 'px');
		objLoadingImage.style.left = (((arrayPageSize[0] - 20 - parameter[0]) / 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;
		objImage.width = parameter[0];
		objImage.height = parameter[1];

		// 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 - parameter[1]) / 2);
		var lightboxLeft = ((arrayPageSize[0] - 20 - parameter[0]) / 2);
		
		objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
		objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";

		//Bilderklick
		//var bkTop = arrayPageScroll[1] + arrayPageSize[3] - 50;
		//var bkLeft = ((arrayPageSize[0] - objBilderKlick.offsetWidth - 20) / 2);
		//objBilderKlick.style.top = (bkTop < 0) ? "0px" : bkTop + "px";
		//objBilderKlick.style.left = (bkLeft < 0) ? "0px" : bkLeft + "px";


		objLightboxDetails.style.width = parameter[0] + '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'; }
		if (objBilderKlick)	{objBilderKlick.style.display = 'block';}

		// 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');
	objBilderKlick = document.getElementById('bilderklick');

	// hide lightbox and overlay
	objBilderKlick.style.display = 'none';
	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 = '';

    if (document.getElementById('banner_1')) {
        document.getElementById('banner_1').style.display = "block";
    }

    if (document.getElementById('banner_2')) {
        document.getElementById('banner_2').style.display = "block";
    }
}




//
// 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()
{
	var objBilderKlick = document.getElementById('bilderklick');
	/*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);
	objOverlay.style.filter='progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=80)';
	
	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");

		//BrowserName = navigator.appName;             
		//BrowserVersion = parseInt(navigator.appVersion);

		if (typeof document.body.style.maxHeight != 'undefined')
		{
			objCloseButton.src = closeButton;
		}
		else
		{
			objCloseButton.src = '/lightbox-plugin/close_old.gif';
		}

		objCloseButton.setAttribute('id','closeButton');
		objCloseButton.style.position = 'absolute';
		objCloseButton.style.zIndex = '200';
		//objCloseButton.style.filter = 'progid:DXImageTransform.Microsoft.AlphaImageLoader(src="'+closeButton+'", sizingMethod="scale")';
		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);

	//bilderklick
	objLightbox.appendChild(objBilderKlick);

	// 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 = '';
	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();
		}
	}

}

function find_substring(_string, _substring)
{
	var string_length = _string.length;
	var substring_length = _substring.length;
	var is_substring = false;

	if (substring_length > string_length) return is_substring;

	for(i=0; i < string_length; i++)
	{
		if (_string.charAt(i) == _substring.charAt(0))
		{
			if (substring_length == 1) is_substring = true;

			for(j=1; j < substring_length; j++)
			{
				if ((i+j) > string_length) break;

				if (_string.charAt(i+j) == _substring.charAt(j))
				{
					if ((j+1) == substring_length)
					{
						is_substring = true;
						break;
					}
				}
				else break;
			}
		}
		if (is_substring == true) break;
	}
	return is_substring;
}

//addLoadEvent(initLightbox);	// run initLightbox onLoad