var loginloadingImage = 'images/loading.gif';
var LoginWidth = 450;
var LoginHeight = 200;

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;
}

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;
}

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'){ hideLoginbox(); }
}


function listenKey () {	document.onkeypress = getKey; }
	
function showLoginbox(objLink)
{
	// prep objects
	var objOverlay = document.getElementById('loginoverlay');
	var objLoginbox = document.getElementById('loginbox');
	var objCaption = document.getElementById('loginboxCaption');
	var objContainer = document.getElementById('loginboxContainer');
	var objLoadingImage = document.getElementById('loginloadingImage');

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

	// center loadingImage if it exists
	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';
	}

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


	// var loginboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - 35 - LoginHeight) / 2);
	var loginboxTop = arrayPageScroll[1] + 80;
	var loginboxLeft = ((arrayPageSize[0] - 20 - LoginWidth) / 2);	

	objLoginbox.style.top = (loginboxTop < 0) ? "0px" : loginboxTop + "px";
	objLoginbox.style.left = (loginboxLeft < 0) ? "0px" : loginboxLeft + "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);
	} 

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

	// 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";
    }

	
	objLoginbox.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');
	
	objContainer.style.backgroundColor = '#FFFFFF';
	objContainer.style.width = LoginWidth;
	objContainer.style.height = LoginHeight + 25;
	objContainer.style.textAlign = 'center';
	objContainer.style.verticalAlign = 'middle';

	l = objLink.getAttribute("href", 2);
	if (l.indexOf("lang=en") != -1) {
		l1 = "Login name";
		l2 = "Login password";
		l3 = "Login";
		l4 = "Close";
		l5 = "Please login";
		l6 = "Lost password?";
		l7 = "Permanent session?";
	}
	else {
		l1 = "Belépési név";
		l2 = "Belépési jelszó";
		l3 = "Belépés";
		l4 = "Bezár";
		l5 = "Kérjük lépjen be";
		l6 = "Elfelejtette a jelszavát?";
		l7 = "Maradjon belépve a számítógépen?";
	}
	cm = '<form method="post" action="index.php">\n';
	cm = cm + '<input type="hidden" name="backurl" value="' + escape(encodeURI(objLink)) + '">\n';
	cm = cm + '<table cellspacing="0" cellpadding="0" style="width:452px;height:227px;text-align:left;">\n';
	cm = cm + '<tr><td style="padding-top: 20px; padding-left: 20px; padding-right: 20px; padding-bottom: 20px;text-align:right;" colspan="2"><a href="#" onclick="hideLoginbox()">' + l4 + '</a></td></tr>\n';
	cm = cm + '<tr><td colspan="2" style="padding-left: 20px; padding-right: 20px; padding-bottom: 10px; font-size: 17px;font-weight:bold;">' + l5 + '</td></tr>\n';
	cm = cm + '<tr><td style="padding-left: 20px; padding-right: 20px; padding-bottom: 5px;font-weight:bold;">' + l1 + '</td></tr><tr><td style="padding-left: 20px; padding-right: 20px; padding-bottom: 10px;"><input type="text" name="username" style="width: 100%;" tabindex="1"></td></tr>\n';
	cm = cm + '<tr><td style="padding-left: 20px; padding-right: 20px; padding-bottom: 5px;font-weight:bold;">' + l2 + '&nbsp;&nbsp;&nbsp;&nbsp;<a href="index.php?page=oldal&amp;cikk=3&amp;other=1" tabindex="5">' + l6 + '</a></td></tr><tr><td style="padding-left: 20px; padding-right: 20px; padding-bottom: 10px;"><input type="password" name="password" style="width: 100%;" tabindex="2"></td></tr>\n';
	cm = cm + '<tr><td style="padding-left: 20px; padding-right: 20px; padding-bottom: 20px;"><table cellspacing="0" cellpadding="0" style="width:100%"><tr><td><table cellspacing="0" cellpadding="0"><tr><td><input type="checkbox" name="noclose" value="1" tabindex="3" checked></td><td>' + l7 + '</td></tr></table></td><td style="text-align:right;"><input type="submit" name="f" value="' + l3 + '" tabindex="4"></td></tr>\n';
	cm = cm + '</table></td></tr>\n';
	cm = cm + '</table></form>\n';
	objContainer.innerHTML = cm; 
}

function hideLoginbox()
{
	// get objects
	objOverlay = document.getElementById('loginoverlay');
	objLoginbox = document.getElementById('loginbox');
	objContainer = document.getElementById('loginboxContainer');

	// hide loginbox and overlay
	objOverlay.style.display = 'none';
	objLoginbox.style.display = 'none';
	objContainer.innerHTML = "";

	// 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 = '';
}

function initLoginbox()
{
	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") == "loginbox")){
			anchor.onclick = function () {showLoginbox(this); return false;}
		}
	}
	
	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','loginoverlay');
	objOverlay.onclick = function () {hideLoginbox(); 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();

	// preload and create loader image
	var imgPreloader = new Image();
	
	// if loader image found, create link to hide loginbox and create loadingimage
	imgPreloader.onload=function() {
		var objLoadingImageLink = document.createElement("a");
		objLoadingImageLink.setAttribute('href','#');
		objLoadingImageLink.onclick = function () {hideLoginbox(); return false;}
		objOverlay.appendChild(objLoadingImageLink);
		
		var objLoadingImage = document.createElement("img");
		objLoadingImage.src = loginloadingImage;
		objLoadingImage.setAttribute('id','loginloadingImage');
		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 = loginloadingImage;

	// create loginbox div, same note about styles as above
	var objLoginbox = document.createElement("div");
	objLoginbox.setAttribute('id','loginbox');
	objLoginbox.style.display = 'none';
	objLoginbox.style.position = 'absolute';
	objLoginbox.style.border = 'solid 1px #E0E0E0';
	objLoginbox.style.zIndex = '100';	
	objBody.insertBefore(objLoginbox, objOverlay.nextSibling);
	
	// create link
	var objLink = document.createElement("a");
	objLink.setAttribute('href','#');
	objLink.onclick = function () {hideLoginbox(); return false;}
	objLoginbox.appendChild(objLink);
	
	// create object
	var objContainer = document.createElement("div");
	objContainer.setAttribute('id','loginboxContainer');
	objContainer.setAttribute('name','loginboxContainer');
	objLoginbox.appendChild(objContainer);	
}

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

}

addLoadEvent(initLoginbox);	// run initLoginbox onLoad