/*
	popupLayer 1.3 JS from lightbox
	After body
	<div><a id="popupLayer" href="popup/fotopalyazat.jpg" rel="http://index.hu" class="pLblank" title="Bezár"></a></div>

	id="popupLayer"
	id="popupLayerCookie"
	rel="http://index.hu"
	class="pLblank"
	title="Bezár"

	v1.3
	IE img.onload bug fix

	v1.2
	Open new window
	Cookie
	Fade effect
*/

//
// Configuration
//

//
// 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 popupLayer.
//

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


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

//
// showpopupLayer()
// Preloads images. Pleaces new image in popupLayer then centers and displays.
//
function showpopupLayer(objpopupLayerLink)
{
	
	// prep objects
	var objOverlay = document.getElementById('popupOverlay');
	var objpopupLayer = document.getElementById('popupLayer');
	var objImage = document.getElementById('popupLayerImage');
	var objCloseLink = document.getElementById('CloseLink');
	

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

	

	// set height of Overlay to take up whole page and show
	objOverlay.style.height = (arrayPageSize[1] + 'px');
	objOverlay.style.display = 'block';
	opacity('popupOverlay', 0, 50, 500);
	

	// preload image
	var picPreload = new Image();

	picPreload.onload=function(){
		if(objImage.src==objpopupLayerLink.href)return; //because of ie wierd behaviour
		objImage.src = objpopupLayerLink.href;
		
		// center popupLayer and make sure that the top and left values are not negative
		// and the image placed outside the viewport
		var popupLayerTop = arrayPageScroll[1] + ((arrayPageSize[3] - 35 - picPreload.height) / 2);
		var popupLayerLeft = ((arrayPageSize[0] - 20 - picPreload.width) / 2);
		
		objpopupLayer.style.top = (popupLayerTop < 0) ? "0px" : popupLayerTop + "px";
		objpopupLayer.style.left = (popupLayerLeft < 0) ? "0px" : popupLayerLeft + "px";


		
		// 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);
		} 
		

		// 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";
		}

	
		objpopupLayer.style.display = 'block';
		opacity('popupLayer', 0, 100, 500);
		objCloseLink.style.display = 'block';
		opacity('CloseLink', 0, 100, 500);
		// 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;
	}

	picPreload.src = objpopupLayerLink.href;

}





//
// hidepopupLayer()
//
function hidepopupLayer()
{
	// get objects
	objOverlay = document.getElementById('popupOverlay');
	objpopupLayer = document.getElementById('popupLayer');
	objCloseLink = document.getElementById('CloseLink');

	// hide popupLayer and overlay
	objOverlay.style.display = 'none';
	objpopupLayer.style.display = 'none';
	objCloseLink.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 = '';
}




//
// initpopupLayer()
// Function runs on window load, going through link tags looking for rel="popupLayer".
// These links receive onclick events that enable the popupLayer 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 initpopupLayer()
{
	if(!document.getElementById("popupLayer") && !document.getElementById("popupLayerCookie"))return;
	var anchor = document.getElementById("popupLayer") ? document.getElementById("popupLayer") : document.getElementById("popupLayerCookie");
	if((anchor.getAttribute('class')!='' || anchor.getAttribute('className')!='') && (anchor.getAttribute('class')!= undefined || anchor.getAttribute('className')!= undefined)) 
	{
		anchorClass = anchor.getAttribute('class') ? anchor.getAttribute('class') : anchor.getAttribute('className');
	}
	if(document.getElementById("popupLayerCookie")){
		if(readCookie('popupLayerCookie'+anchor.href))return;
		createCookie('popupLayerCookie'+anchor.href,true,1);
	}
//
	// <div id="overlay"></div>
	// <div id="popupLayer"><a><img id="popupLayerImage" /></a></div>	
	// <a>Bezár</a>
	
	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','popupOverlay');
	objOverlay.onclick = function () {hidepopupLayer(); 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%';
	objOverlay.style.background = '#666';
	objOverlay.style.opacity = '0';
	objOverlay.style.filter = 'alpha(opacity=0)';
	objBody.insertBefore(objOverlay, objBody.firstChild);
	
	
	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();

	// create popupLayer div, same note about styles as above
	var objpopupLayer = document.createElement("div");
	objpopupLayer.setAttribute('id','popupLayer');
	objpopupLayer.style.display = 'none';
	objpopupLayer.style.position = 'absolute';
	objpopupLayer.style.zIndex = '100';
	objpopupLayer.style.border = '1px solid #ddd';
	objpopupLayer.style.opacity = '0';
	objpopupLayer.style.filter = 'alpha(opacity=0)';	
	objBody.insertBefore(objpopupLayer, objOverlay.nextSibling);
	
	// create link
	var objpopupLayerLink = document.createElement("a");
	objpopupLayerLink.setAttribute('href','#');
	if(anchor.rel)
	{	
		objpopupLayerLink.setAttribute('title','Tovább');
		if(anchorClass && anchorClass=='pLblank') {
			objpopupLayerLink.onclick = function () {window.open(anchor.rel, "_blank"); hidepopupLayer(); return false;}
		} else {
			objpopupLayerLink.onclick = function () {document.location.href=anchor.rel; return false;}
		}
	} else {
		if(anchor.title)objpopupLayerLink.setAttribute('title',anchor.title);	
		objpopupLayerLink.onclick = function () {hidepopupLayer(); return false;}
	}
	objpopupLayer.appendChild(objpopupLayerLink);

	var objCloseLink = document.createElement('a');
	objCloseLink.setAttribute('id','CloseLink');
	objCloseLink.href = '#ng';
	objCloseLink.innerHTML = anchor.title ? anchor.title : 'Close';
	objCloseLink.onclick = function () {hidepopupLayer(); return false;}
	objCloseLink.style.position = 'absolute';
	objCloseLink.style.zIndex = '90';
	objCloseLink.style.display = 'none';
	objCloseLink.style.font = 'normal 10px arial';
	objCloseLink.style.textDecoration = "none";
	objCloseLink.style.color = "#fff";
	objCloseLink.style.background = '#000';
	objCloseLink.style.padding = '2px 5px';
	objCloseLink.style.top = '20px';
	objCloseLink.style.right = '20px';
	objCloseLink.style.textAlign = 'center';
	objCloseLink.style.opacity = '0';
	objCloseLink.style.filter = 'alpha(opacity=0)';
	objBody.insertBefore(objCloseLink, objpopupLayer.nextSibling);


	// create image
	var objImage = document.createElement("img");
	objImage.setAttribute('id','popupLayerImage');
	objImage.style.border = 'solid 4px #fff';
	objImage.style.display = 'block';
	objpopupLayerLink.appendChild(objImage);
	
	//mutassad!
	showpopupLayer(anchor);
}


/*
cookie
*/
function createCookie(name,value,hours) {
	if (hours) {
		var date = new Date();
		date.setTime(date.getTime()+(hours*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

/*
	fade
*/

	function opacity(id, opacStart, opacEnd, millisec) {
		//speed for each frame
		var speed = Math.round(millisec / 100);
		var timer = 0;

		//determine the direction for the blending, if start and end are the same nothing happens
		if(opacStart > opacEnd) {
			for(i = opacStart; i >= opacEnd; i--) {
				setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
				timer++;
			}
		} else if(opacStart < opacEnd) {
			for(i = opacStart; i <= opacEnd; i++)
				{
				setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
				timer++;
			}
		}
	}

	//change the opacity for different browsers
	function changeOpac(opacity, id) {
		var object = document.getElementById(id).style; 
		object.opacity = (opacity / 100);
		object.MozOpacity = (opacity / 100);
		object.KhtmlOpacity = (opacity / 100);
		object.filter = "alpha(opacity=" + opacity + ")";
	}

	function shiftOpacity(id, millisec) {
		//if an element is invisible, make it visible, else make it ivisible
		if(document.getElementById(id).style.opacity == 0) {
			opacity(id, 0, 100, millisec);
		} else {
			opacity(id, 100, 0, millisec);
		}
	}

	function blendimage(divid, imageid, imagefile, millisec) {
		var speed = Math.round(millisec / 100);
		var timer = 0;

		//set the current image as background
		document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")";

		//make image transparent
		changeOpac(0, imageid);

		//make new image
		document.getElementById(imageid).src = imagefile;

		//fade in image
		for(i = 0; i <= 100; i++) {
			setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed));
			timer++;
		}
	}

	function currentOpac(id, opacEnd, millisec) {
		//standard opacity is 100
		var currentOpac = 100;

		//if the element has an opacity set, get it
		if(document.getElementById(id).style.opacity < 100) {
			currentOpac = document.getElementById(id).style.opacity * 100;
		}

		//call for the function that changes the opacity
		opacity(id, currentOpac, opacEnd, millisec)
	}
	
/*
	Bind
*/	

//
// 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(initpopupLayer);	// run initpopupLayer onLoad
*/
if (window.attachEvent) {
// IE
window.attachEvent("onload", initpopupLayer);
} else {
// DOM
window.addEventListener("load", initpopupLayer, false);
}