// -----------------------------------------------------------------------------------
//
//	Ajaxbox v2.03.3
//	by Lokesh Dhakar - http://www.huddletogether.com
//	5/21/06
//
//	For more information on this script, visit:
//	http://huddletogether.com/projects/ajaxbox2/
//
//	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
//	
//	Credit also due to those who have helped, inspired, and made their code available to the public.
//	Including: Scott Upton(uptonic.com), Peter-Paul Koch(quirksmode.com), Thomas Fuchs(mir.aculo.us), and others.
//
//
// -----------------------------------------------------------------------------------


//
//	Additional methods for Element added by SU, Couloir
//	- further additions by Lokesh Dhakar (huddletogether.com)
//
Object.extend(Element, {
	getWidth: function(element) {
	   	element = $(element);
	   	return element.offsetWidth; 
	},
	setWidth: function(element,w) {
	   	element = $(element);
    	element.style.width = w +"px";
	},
	setHeight: function(element,h) {
   		element = $(element);
    	element.style.height = h +"px";
	},
	setTop: function(element,t) {
	   	element = $(element);
    	element.style.top = t +"px";
	},
	setLeft: function(element,l) {
	   	element = $(element);
    	element.style.left = l +"px";
	},
	setSrc: function(element,src) {
    	element = $(element);
    	element.src = src; 
	},
	setHref: function(element,href) {
    	element = $(element);
    	element.href = href; 
	},
	setInnerHTML: function(element,content) {
		element = $(element);
		element.innerHTML = content;
	}
});

// -----------------------------------------------------------------------------------

//
//	Extending built-in Array object
//	- array.removeDuplicates()
//	- array.empty()
//
Array.prototype.removeDuplicates = function () {
    for(i = 0; i < this.length; i++){
        for(j = this.length-1; j>i; j--){        
            if(this[i][0] == this[j][0]){
                this.splice(j,1);
            }
        }
    }
}

// -----------------------------------------------------------------------------------

Array.prototype.empty = function () {
	for(i = 0; i <= this.length; i++){
		this.shift();
	}
}

// -----------------------------------------------------------------------------------

//
//	Ajaxbox Class Declaration
//	- initialize()
//	- start()
//	- changeImage()
//	- resizeImageContainer()
//	- showImage()
//	- updateDetails()
//	- updateNav()
//	- enableKeyboardNav()
//	- disableKeyboardNav()
//	- keyboardNavAction()
//	- preloadNeighborImages()
//	- end()
//
//	Structuring of code inspired by Scott Upton (http://www.uptonic.com/)
//
var Ajaxbox = Class.create();

Ajaxbox.prototype = {
	
	// initialize()
	// Constructor runs on completion of the DOM loading. Calls updateImageList and then
	// the function inserts html at the bottom of the page which is used to display the shadow 
	// overlay and the image container.
	//
	initialize: function() {	
		
		//this.updateImageList();
		
		this.updateDocAnchors();

		// Code inserts html at the bottom of the page that looks similar to this:
		//
		//	<div id="AjaxOverlay"></div>
		//	<div id="ajaxbox">
		//		<div id="ajaxOuterImageContainer">
		//			<div id="ajaxImageContainer">
		//				<div id="loading">
		//					<a href="#" id="loadingLink">
		//						<img src="images/loading.gif">
		//					</a>
		//				</div>
		//				<div id="myAJAX"></div>
		//				<div id="bottomNav">
		//					<a id="bottomNavClose"><img></a>
		//				</div>
		//			</div>
		//		</div>
		//	</div>


		var AjaxObjBody = document.getElementsByTagName("body").item(0);
		
		var AjaxObjOverlay = document.createElement("div");
		AjaxObjOverlay.setAttribute('id','overlay');
		AjaxObjOverlay.style.display = 'none';
		AjaxObjOverlay.onclick = function() { myAjaxbox.end(); }
		AjaxObjBody.appendChild(AjaxObjOverlay);
		
		var objAjaxbox = document.createElement("div");
		objAjaxbox.setAttribute('id','ajaxbox');
		objAjaxbox.style.display = 'none';
		objAjaxbox.onclick = function(e) {	// close Ajaxbox is user clicks shadow overlay
			if (!e) var e = window.event;
			var clickObj = Event.element(e).id;
			if ( clickObj == 'ajaxbox') {
				myAjaxbox.end();
			}
		};
		AjaxObjBody.appendChild(objAjaxbox);
			
		var objAjaxOuterImageContainer = document.createElement("div");
		objAjaxOuterImageContainer.setAttribute('id','ajaxOuterImageContainer');
		objAjaxbox.appendChild(objAjaxOuterImageContainer);

		// When Ajaxbox starts it will resize itself from 250 by 250 to the current image dimension.
		// If animations are turned off, it will be hidden as to prevent a flicker of a
		// white 250 by 250 box.
		if(animate){
			Element.setWidth('ajaxOuterImageContainer', 250); // 250
			Element.setHeight('ajaxOuterImageContainer', 250);	// 250	 	
		} else {
			Element.setWidth('ajaxOuterImageContainer', 1); // 1
			Element.setHeight('ajaxOuterImageContainer', 1);// 1			
		}

		var objAjaxImageContainer = document.createElement("div");
		objAjaxImageContainer.setAttribute('id','ajaxImageContainer');
		objAjaxOuterImageContainer.appendChild(objAjaxImageContainer);
	
		var objLoading = document.createElement("div");
		objLoading.setAttribute('id','ajaxLoading');
		objAjaxImageContainer.appendChild(objLoading);
	
		var objAjaxOuterImageContainer = document.createElement("a");
		objAjaxOuterImageContainer.setAttribute('id','ajaxLoadingLink');
		objAjaxOuterImageContainer.setAttribute('href','#');
		objAjaxOuterImageContainer.onclick = function() { myAjaxbox.end(); return false; }
		objLoading.appendChild(objAjaxOuterImageContainer);
		
		var objAjaxBottomNav = document.createElement("div");
		objAjaxBottomNav.setAttribute('id','ajaxBottomNav');
		objAjaxBottomNav.setAttribute('align','right');
		objAjaxImageContainer.appendChild(objAjaxBottomNav);
	
		var objAjaxBottomNavCloseLink = document.createElement("a");
		objAjaxBottomNavCloseLink.setAttribute('id','ajaxBottomNavClose');
		objAjaxBottomNavCloseLink.setAttribute('href','#');
		objAjaxBottomNavCloseLink.onclick = function() { myAjaxbox.end(); return false; }
		objAjaxBottomNav.appendChild(objAjaxBottomNavCloseLink);
	
		var objAjaxBottomNavCloseImage = document.createElement("img");
		objAjaxBottomNavCloseImage.setAttribute('src', fileBottomNavCloseImage);
		objAjaxBottomNavCloseLink.appendChild(objAjaxBottomNavCloseImage);
		
		var objAjaxData = document.createElement("div");
		objAjaxData.setAttribute('id','ajaxData');
		objAjaxImageContainer.appendChild(objAjaxData);
		
		
	},


	//
	// updateDocAnchors()
	// Loops through anchor tags looking for 'ajaxbox' references and applies onclick
	// events to appropriate links. You can rerun after dynamically adding images w/ajax.
	//
	updateDocAnchors: function() {	
		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];
			
			var relAttribute = String(anchor.getAttribute('rel'));
			
			// use the string.match() method to catch 'ajaxbox' references in the rel attribute
			if (anchor.getAttribute('href') && (relAttribute.toLowerCase().match('ajaxbox'))){
				anchor.onclick = function () {myAjaxbox.start(this); return false;}
			}
		}

	},
	
	
	//
	//	start()
	//	Display overlay and ajaxbox. If image is part of a set, add siblings to imageArray.
	//
	start: function(anchor) {	
		
		var URL;
		
		// set new width and height
		var AJAXwidthNew = 600;
		var AJAXheightNew = 400;
		
		
		if((anchor.getAttribute('rel') == 'ajaxbox')){
			URL = anchor.getAttribute('href');
			if(anchor.getAttribute('name') != "") {
				tmp = anchor.getAttribute('name').split(',');
				AJAXwidthNew = parseInt(tmp[0]);
				AJAXheightNew = parseInt(tmp[1]);
			}
		}
		
		// Höhe des objAjaxData anpassen
		
		objAjaxImageContainer = document.getElementById("ajaxImageContainer");
		objAjaxImageContainer.setAttribute('height', parseInt(AJAXheightNew-50)+"px");
		
		
		objAjaxData = document.getElementById("ajaxData");
		objAjaxData.setAttribute('style', 'height:'+ parseInt(AJAXheightNew-50) +'px;overflow:auto;margin-top:10px;');
		objAjaxData.setAttribute('height', parseInt(AJAXheightNew-50)+"px");
		
		
		hideSelectBoxes();
		hideFlash();

		// stretch overlay to fill page and fade in
		var arrayPageSize = getPageSize();
		Element.setWidth('overlay', arrayPageSize[0]);
		Element.setHeight('overlay', arrayPageSize[1]);
		
		new Effect.Appear('overlay', { duration: overlayDuration, from: 0.3, to: overlayOpacity });
		//Element.show('overlay');
		
		pause(200);
		
		// calculate top and left offset for the ajaxbox 
		var arrayPageScroll = getPageScroll();
		var ajaxboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 10);
		var ajaxboxLeft = arrayPageScroll[0];
		Element.setTop('ajaxbox', ajaxboxTop);
		Element.setLeft('ajaxbox', ajaxboxLeft);
		
		Element.show('ajaxbox');
		
		Element.hide('ajaxImageContainer');
		if(animate){ Element.show('ajaxLoading');}
		
		
		myAjaxbox.resizeImageContainer(URL, AJAXwidthNew, AJAXheightNew);
	},


	//
	//	resizeImageContainer()
	//
	resizeImageContainer: function(URL, AJAXwidthNew, AJAXheightNew) {

		// get curren width and height
		this.AJAXwidthCurrent = Element.getWidth('ajaxOuterImageContainer');
		this.AJAXheightCurrent = Element.getHeight('ajaxOuterImageContainer');

		// scalars based on change from old to new
		this.AJAXxScale = ( AJAXwidthNew / this.AJAXwidthCurrent) * 100;
		this.AJAXyScale = ( AJAXheightNew / this.AJAXheightCurrent) * 100;

		// calculate size difference between new and old image, and resize if necessary
		AJAXwDiff = this.AJAXwidthCurrent - AJAXwidthNew;
		AJAXhDiff = this.AJAXheightCurrent - AJAXheightNew;

		if(!( AJAXhDiff == 0)){ new Effect.Scale('ajaxOuterImageContainer', this.AJAXyScale, {scaleX: false, duration: resizeDuration, queue: 'front'}); }
		if(!( AJAXwDiff == 0)){ new Effect.Scale('ajaxOuterImageContainer', this.AJAXxScale, {scaleY: false, delay: resizeDuration, duration: resizeDuration}); }

		// if new and old image are same size and no scaling transition is necessary, 
		// do a quick pause to prevent image flicker.
		if((AJAXhDiff == 0) && (AJAXwDiff == 0)){
			if (navigator.appVersion.indexOf("MSIE")!=-1){ pause(250); }
			else { pause(100);} 
		}

		this.loadData(URL);
	},
	
	//
	//	showImage()
	//	Display image and begin preloading neighbors.
	//
	loadData: function(URL){
	
		
		new Effect.Appear('ajaxImageContainer', { duration: resizeDuration, queue: 'end' });
		
		document.getElementById("ajaxData").innerHTML = URL + " wird geladen...";
		//Element.show('ajaxImageContainer');
		//Element.hide('ajaxLoading');		
		
		if (ajax_http != null) {
		   ajax_http.open("GET", URL, true);
		   
		   ajax_http.onreadystatechange = ausgeben;
		   ajax_http.send(null);
		   id = window.setTimeout("abbrechen()", 10000); // 10 Sek. timeout
		} else {
			document.getElementById("ajaxData").innerHTML = URL + " kann nicht geladen werden!";
		}
		

	},

	//
	//	enableKeyboardNav()
	//
	enableKeyboardNav: function() {
		document.onkeydown = this.keyboardAction; 
	},

	//
	//	disableKeyboardNav()
	//
	disableKeyboardNav: function() {
		document.onkeydown = '';
	},

	//
	//	keyboardAction()
	//
	keyboardAction: function(e) {
		if (e == null) { // ie
			keycode = event.keyCode;
			escapeKey = 27;
		} else { // mozilla
			keycode = e.keyCode;
			escapeKey = e.DOM_VK_ESCAPE;
		}

		key = String.fromCharCode(keycode).toLowerCase();
		
		if((key == 'x') || (key == 'o') || (key == 'c') || (keycode == escapeKey)){	// close ajaxbox
			myAjaxbox.end();
		} else if((key == 'p') || (keycode == 37)){	// display previous image
			if(activeImage != 0){
				myAjaxbox.disableKeyboardNav();
				myAjaxbox.changeImage(activeImage - 1);
			}
		} else if((key == 'n') || (keycode == 39)){	// display next image
			if(activeImage != (imageArray.length - 1)){
				myAjaxbox.disableKeyboardNav();
				myAjaxbox.changeImage(activeImage + 1);
			}
		}

	},

	//
	//	preloadNeighborImages()
	//	Preload previous and next images.
	//
	preloadNeighborImages: function(){
	},

	//
	//	end()
	//
	end: function() {
		this.disableKeyboardNav();
		Element.hide('ajaxbox');
		new Effect.Fade('overlay', { duration: overlayDuration});
		showSelectBoxes();
		showFlash();
	}
}

// -----------------------------------------------------------------------------------

//
// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.com
//
function getPageScroll(){

	var xScroll, yScroll;

	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
		xScroll = self.pageXOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
		xScroll = document.documentElement.scrollLeft;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
		xScroll = document.body.scrollLeft;	
	}

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

// -----------------------------------------------------------------------------------

//
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.com
// Edit for Firefox by pHaez
//
function getPageSize(){
	
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = window.innerWidth + window.scrollMaxX;
		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;
	
//	console.log(self.innerWidth);
//	console.log(document.documentElement.clientWidth);

	if (self.innerHeight) {	// all except Explorer
		if(document.documentElement.clientWidth){
			windowWidth = document.documentElement.clientWidth; 
		} else {
			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;
	}

//	console.log("xScroll " + xScroll)
//	console.log("windowWidth " + windowWidth)

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = xScroll;		
	} else {
		pageWidth = windowWidth;
	}
//	console.log("pageWidth " + pageWidth)

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

// -----------------------------------------------------------------------------------

//
// getKey(key)
// Gets keycode. If 'x' is pressed then it hides the ajaxbox.
//
function getKey(e){
	if (e == null) { // ie
		keycode = event.keyCode;
	} else { // mozilla
		keycode = e.which;
	}
	key = String.fromCharCode(keycode).toLowerCase();
	
	if(key == 'x'){
	}
}

// -----------------------------------------------------------------------------------

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

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

// ---------------------------------------------------

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

// ---------------------------------------------------

function showFlash(){
	var flashObjects = document.getElementsByTagName("object");
	for (i = 0; i < flashObjects.length; i++) {
		flashObjects[i].style.visibility = "visible";
	}

	var flashEmbeds = document.getElementsByTagName("embed");
	for (i = 0; i < flashEmbeds.length; i++) {
		flashEmbeds[i].style.visibility = "visible";
	}
}

// ---------------------------------------------------

function hideFlash(){
	var flashObjects = document.getElementsByTagName("object");
	for (i = 0; i < flashObjects.length; i++) {
		flashObjects[i].style.visibility = "hidden";
	}

	var flashEmbeds = document.getElementsByTagName("embed");
	for (i = 0; i < flashEmbeds.length; i++) {
		flashEmbeds[i].style.visibility = "hidden";
	}

}


// ---------------------------------------------------

//
// pause(numberMillis)
// Pauses code execution for specified time. Uses busy code, not good.
// Help from Ran Bar-On [ran2103@gmail.com]
//

function pause(ms){
	var date = new Date();
	curDate = null;
	do{var curDate = new Date();}
	while( curDate - date < ms);
}
/*
function pause(numberMillis) {
	var curently = new Date().getTime() + sender;
	while (new Date().getTime();	
}
*/
// ---------------------------------------------------



function initAjaxbox() { myAjaxbox = new Ajaxbox(); }
Event.observe(window, 'load', initAjaxbox, false);