var lastMenuId = 0;
var timer;
var mSheets = new Array();
var currZ = 100;
var mReady = false; 

function setClass(obj, cl){
  if (!cl) cl = "";  
  obj.className = cl;
}

function setClassById(objid, cl){
  obj = document.getElementById(objid);
  setClass(obj, cl);
}

function changeDisplayById(objId){
  for (c = 0; c < changeDisplayById.arguments.length; c++){
    obj = document.getElementById(changeDisplayById.arguments[c]);
    if (obj.style.display == 'none') obj.style.display = 'block';
    else obj.style.display = 'none';
  }  
}

function gotoURL(url){
  if (!url) url = "default.htm";
  if (window.event){
    var src = window.event.srcElement; 
    if((src.tagName != 'A') && ((src.tagName != 'IMG') || (src.parentElement.tagName != 'A'))){
      if (window.event.shiftKey) window.open(url);
      else document.location = url;
    }
  } else document.location = url;
}

function getLeftPos(obj){
  var res = 0;
  while (obj){
    res += obj.offsetLeft;
    obj = obj.offsetParent;
  }
  return res;
}

function getTopPos(obj){
  var res = 0;
  while (obj){
    res += obj.offsetTop;
    obj = obj.offsetParent;
  }
  return res;
}

function setImgSrc(idVal, srcVal){
  if (document.images) document.images[idVal].src = ""+ srcVal;
}

function MenuLink(textVal, linkVal, subVal){
  this.text = textVal;
  this.action = linkVal;
  this.submenu = subVal;
}

function menuHideAll(){
 for (var c in mSheets) mSheets[c].hide();
}

function menuHideTimerSet(){
  timer = window.setTimeout(menuHideAll, 100);
}

function menuHideTimerReset(){
  if (timer) window.clearTimeout(timer);
}

function menuAddLink(textVal, linkVal){
  this.links[this.links.length] = new MenuLink(textVal, linkVal, null);
}

function menuAddSubmenu(textVal, linkVal){
  this.links[this.links.length] = new MenuLink(textVal, linkVal, new MenuSheet(this));
}

function menuShow(leftVal, topVal){
  this.block.style.left = leftVal;
  this.block.style.top = topVal;   
  this.block.style.display = "block";
}

function menuHide(){
  this.hideCh();
  this.block.style.display = "none";
}

function menuFlip(leftVal, topVal){
  var disp = this.block.style.display;
  if (disp == "none") this.show(leftVal, topVal);
  else this.hide();
}

function menuHideCh(){
  for (var c in this.links){
    curLink = this.links[c];
    if (curLink.submenu) curLink.submenu.hide();
  }
}

function menuCreate(path){
  var res = "<table cellpadding=\"0\" cellspacing=\"0\" onmouseout=\"menuHideTimerSet()\" onmouseover=\"menuHideTimerReset()\" class=\"tab-menu-sh\">";
  var curLink;
  var newPath;
  if (path == null) path = "mSheets[" + this.id + "]";
  for (var c in this.links){
    curLink = this.links[c];
    res += "<tr><td class=\"blk-menu-sh";
    if (curLink.submenu) res += " blk-menu-arr";
    res += "\" onmouseover=\"setClass(this, 'blk-menu-sh-act";
    if (curLink.submenu) res += " blk-menu-arr-act";    
    res += "'); ";     
    res += path + ".hideCh()";
    if (curLink.submenu){
      newPath = path + ".links[" + c + "].submenu";
      res += "; " + newPath + ".show(getLeftPos(this) + this.offsetWidth, getTopPos(this) - 2)";
      curLink.submenu.create(newPath);      
    }
    res += "\" onmouseout=\"setClass(this, 'blk-menu-sh";
    if (curLink.submenu) res += " blk-menu-arr";    
    res += "')\" onclick=\"gotoURL('"+curLink.action+"')\"><nobr>" + curLink.text + "</nobr></td></tr>";
  }      
  res += "</table>";
//  alert(res);
  this.block.innerHTML = res;
}

function MenuSheet(parentObj){
  this.links = new Array();
  this.addLink = menuAddLink;
  this.addSubmenu = menuAddSubmenu;
  this.create = menuCreate;
  this.show = menuShow;
  this.hide = menuHide;
  this.flip = menuFlip;
  this.hideCh = menuHideCh;
  this.id = lastMenuId;
  lastMenuId++;  
  this.parent = parentObj; 
  this.block = document.createElement("DIV");
  this.block.style.display = "none";
  this.block.style.zIndex = currZ;
  currZ++;  
  this.block.className = "blk-menu";
  this.block.id = "ms" + this.id; 
  document.body.appendChild(this.block);      
}

function showMenu(objVal, numVal){
  if (mReady){
    menuHideAll();
    objVal.className = "item act";
    setImgSrc("m_tit" + numVal, ImgPath  + mImgNames[numVal] + "-act.gif");
  
    mSheets[numVal].show(getLeftPos(objVal) - -0, 90);
    
    menuHideTimerReset();
  }  
}

function hideMenu(objVal, numVal){
  if (mReady){
    menuHideTimerSet();
  
    objVal.className = "item";
    setImgSrc("m_tit" + numVal, ImgPath+ mImgNames[numVal] + ".gif");
  }  
}


/*
	Lightbox JS: Fullsize Image Overlays 
	by Lokesh Dhakar - http://www.huddletogether.com

	For more information on this script, visit:
	http://huddletogether.com/projects/lightbox/

	Script featured on Dynamic Drive code library Jan 24th, 06':
	http://www.dynamicdrive.com

	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)

*/



//
// Configuration
//

// If you would like to use a custom loading image or close button reference them in the next two lines.
var loadingImage = '/templates/images/gallery/loading.gif';		
var closeButton = '/templates/images/gallery/close.gif';		





//
// 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.
//
function showLightbox(objLink)
{
	// 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 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';

	// preload image
	imgPreload = new Image();

	imgPreload.onload=function(){
		objImage.src = objLink.href;

		// 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 - 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.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'; }
		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');

	// hide lightbox and overlay
	objOverlay.style.display = 'none';
	objLightbox.style.display = 'none';
	
	// disable keypress listener
	document.onkeypress = '';
}




//
// 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()
{
	
	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);
	
	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");
		objCloseButton.src = closeButton;
		objCloseButton.setAttribute('id','closeButton');
		objCloseButton.style.position = 'absolute';
		objCloseButton.style.zIndex = '200';
		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);

	// 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 = 'нажмите <kbd>x</kbd> для закрытия';
	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();
		}
	}

}



addLoadEvent(initLightbox);	// run initLightbox onLoad