/**
 * CLASS Menu
 */
function Menu(id){

  /*menu id*/
  this.id=id;

  /*cookie settings*/
  this.useCookie=false;  
  this.expireDays=1000;

  /*images settings*/
  this.useImgOnClick=false;
  this.imgListSrc='';
  this.imgFolderOpenSrc='';
  this.imgFolderCloseSrc='';

  /**
   * Funkcia pre inicializaciu menu
   */
  function init_menu(){

    elMenu=document.getElementById(this.id);
    liList=elMenu.getElementsByTagName('li');

    //ak je nastavena cookie, rozbalim polozky menu
    if(this.useCookie){
      var activeBlocks = this.getCookie(this.id);

      activeBlocks=activeBlocks.split('*');
    }

    if(liList.length!=0){
      //vsetko co nie je potrebne, skryjem
      for(i=0; i<liList.length; i++){
        ulList=liList[i].getElementsByTagName('ul');
        if(ulList.length!=0){
          for(x=0; x<ulList.length; x++){

            //ak su pouzite cookies, zobrazim viditelne polozky
            if(this.useCookie){
              if(activeBlocks.indexOf(ulList[x].id) == -1){
                ulList[x].style.display='none';
                if(this.useImgOnClick){
                  li=ulList[x].parentNode;
                  imgList=li.getElementsByTagName('img');
                  imgList[0].src=this.imgFolderCloseSrc;
                }

              }
              else{
                ulList[x].style.display='block';
                if(this.useImgOnClick){
                  li=ulList[x].parentNode;
                  imgList=li.getElementsByTagName('img');
                  imgList[0].src=this.imgFolderOpenSrc;
                }
              }
            }
            else{
              //inak vsetko skryjem
              ulList[x].style.display='none';
              //ak je pouzity obrazok, nastavim rezim ,,zatvoreny,,
              if(this.useImgOnClick){
                li=ulList[x].parentNode;
                imgList=li.getElementsByTagName('img');
                imgList[0].src=this.imgFolderCloseSrc;
              }
            }
            
          }
        }
        else{
          if(this.useImgOnClick){
            imgList=liList[i].getElementsByTagName('img');
            imgList[0].src=this.imgListSrc;
          }
        }
      }
    }
  }


  /**
   * Zobrazi blok mojho najblizsieho vnoreneho zoznamu
   */
  function showMyChildBlock(item){
    if(item!=null){
      ulList=item.getElementsByTagName('ul');
      if(ulList.length!=0){
        
        ulList[0].style.display='block';
      }
    }
  }

  /**
   * Skryje blok mojho najblizsieho vnoreneho zoznamu
   */
  function hideMyChildBlock(item){
    if(item!=null){
      ulList=item.getElementsByTagName('ul');
      if(ulList.length!=0){
        ulList[0].style.display='none';
      }
    }
  }


  /**
   * Zobrazenie kontextoveho menu
   */
  function showContextMenu(e, box, dataElId){
    //ziskam data pre menu
    //data su ulozene externe, mimo blok
    var elMenuData=document.getElementById(dataElId);

    var clickId=getMouseClickButtonId(e);

    //ak je id 1, kliklo sa pravym, skryjem menu
    if(clickId==1){
      this.hideContextMenu(box, dataElId);
      return;
    }//ak sa kliklo pravym, presuniem menu dalej
    else if(clickId==3){
    
      //ak nemam data, nemozem pracovat dalej
      if(elMenuData==null)
        return;

      var elChildMenu = document.getElementById(this.id);

      //ak je menu zobrazene, tak ho zmazem a zobrazim na inom mieste
      if(elChildMenu!=null){
        this.hideContextMenu(box, dataElId);
      }
    
      //vytvorim si menu
      var elNewMenu = document.createElement('ul');
      var divIdName = this.id;
      elNewMenu.setAttribute('id',divIdName);

      //nasledne do neho preklopim data pre menu
      elNewMenu.innerHTML = elMenuData.innerHTML;


      //potrebujem zobrazit suradnice menu na potrebnu poziciu v boxe

      var xPos=getMouseXY(e, box).x;
      var yPos=getMouseXY(e, box).y;

      elNewMenu.style.position='absolute';
      elNewMenu.style.top=yPos+'px';
      elNewMenu.style.left=xPos+'px';
     

      //informujem o sebe rodica
      box.appendChild(elNewMenu);
      //inicializacia menu
      this.init_menu(this.id);
    }

  }

  /**
   * Skrytie kontextoveho menu
   */
  function hideContextMenu(box, dataElId){
    var elChildMenu = document.getElementById(this.id);
    if(elChildMenu!=null){
      box.removeChild(elChildMenu);
    }
  }

  /**
   * Funkcia pre zobrazenie alebo skrytie mojho vnoreneho zoznamu
   */
  function clickToSetMyChildren(item){

    //ziskam si moje rodicovske ,,li,,
    elLi=item.parentNode;

    if(elLi!=null){
      //zistim najblizsie ul
      ulList=elLi.getElementsByTagName('ul');
      if(ulList.length!=0){
        //viem ze prvy element je moje dieta
        x=0;
        var ulBlock=ulList[x];

        if(ulBlock.style.display=='none'){
          ulBlock.style.display='block';
          if(this.useCookie){
            this.setBlockIdToCookie(this.id, ulBlock.id);
          }
          if(this.useImgOnClick){
            imgList=elLi.getElementsByTagName('img');
            imgList[0].src=this.imgFolderOpenSrc;
          }

        }
        else{
          ulBlock.style.display='none';
          if(this.useCookie){
            unsetBlockIdFromCookie(this.id, ulBlock.id);
            ulChildList=ulBlock.getElementsByTagName('ul');
            if(ulChildList.length > 0){
              for(x=0; x<ulChildList.length; x++){
                unsetBlockIdFromCookie(this.id, ulChildList[x].id);
              }
            }
          }
          if(this.useImgOnClick){
            imgList=elLi.getElementsByTagName('img');
            imgList[0].src=this.imgFolderCloseSrc;
          }
        }
      }
    }
  }

  /**
   * Funkcia pre zobrazenie vsetkych poloziek
   */
  function showAllMenuItems(){
    elMenu=document.getElementById(this.id);
    liList=elMenu.getElementsByTagName('li');

    if(liList.length!=0){
      for(i=0; i<liList.length; i++){
        ulList=liList[i].getElementsByTagName('ul');
        if(ulList.length!=0){
          for(x=0; x<ulList.length; x++){
            ulList[x].style.display='block';
          }
        }
      }
    }
  }

  /**
   * Funkcia pre skytie vsetkych poloziek
   */
  function hideAllMenuItems(){
    elMenu=document.getElementById(this.id);
    liList=elMenu.getElementsByTagName('li');

    if(liList.length!=0){
      for(i=0; i<liList.length; i++){
        ulList=liList[i].getElementsByTagName('ul');
        if(ulList.length!=0){
          for(x=0; x<ulList.length; x++){
            ulList[x].style.display='none';
          }
        }
      }
    }

    //vymazem cookie, ak je pouzivana
    if(this.useCookie){
      this.setCookie(this.id, '');
    }
  }

  /*
   * Funkcia nastavi do cookie, ze je blok zobrazeny
   */
  function setBlockIdToCookie(id,value){
    var activeBlocks=getCookie(id);

    if(activeBlocks.length!=0){
      if(activeBlocks.toString().indexOf(value)== -1)
        value=activeBlocks+'*'+value;
    }
  
    setCookie(id,value);
  }

  /*
   * Funkcia odstrani blok z cookie
   */
  function unsetBlockIdFromCookie(id,value){
    var activeBlocks=getCookie(id);

    activeBlocks=activeBlocks.split('*');

    for(i=0; i<activeBlocks.length; i++){
      if(activeBlocks[i]==value){
        delete activeBlocks[i];
      }
    }

    var a=0;
    var newActiveBlocks=new Array();
    for(i=0; i<activeBlocks.length; i++){
      if(activeBlocks[i]!=null){
        newActiveBlocks.push(activeBlocks[i]);
      }
    }

    value=newActiveBlocks.join('*');

    setCookie(id,value);
  }

  /**********************************************************************/
  /***************************POMOCNE FUNKCIE****************************/
  /**********************************************************************/


  /**
   * Funkcia pre ziskane pozicie kurzora pre kontextove menu
   */
  function getMouseXY(e, box){
    if (!e) e = window.event;

    if (e){

      if (e.pageX || e.pageY){
        //(FF,Moz,Opera7)
        mousex = e.pageX - box.offsetLeft;
        mousey = e.pageY - box.offsetTop;
        algor = '[e.pageX]';
        if (e.clientX || e.clientY)
          algor += ' [e.clientX] ';
      }
      else if (e.clientX || e.clientY){
        //IE6,FF,Moz,Opera7
        //mousex = e.clientX + document.body.scrollLeft;
        //mousey = e.clientY + document.body.scrollTop;

        mousex = e.offsetX;
        mousey = e.offsetY;
        algor = '[e.clientX]';
        if (e.pageX || e.pageY)
          algor += ' [e.pageX] ';
      }
    }
    return {
      x:mousex,
      y:mousey
    }
  }

  /**
   * Funkcia pre kontextove menu, ktorym tlacidlom sa kliklo
   */
  function getMouseClickButtonId(e){
    if (!e)
      e = window.event;
    
    //mousedown Opera nepodporuje oncontextmenu
    if(e.type=='click'){
      return 1;
    }
    else if(e.type=='contextmenu' || e.type=='mousedown'){
      return 3;
    }
    else{
      return 0;
    }
  }

  /**
   * Ziskanie cookie hodnoty
   */
  function getCookie(c_name){
    if (document.cookie.length>0){
      c_start=document.cookie.indexOf(c_name + "=");
      if (c_start!=-1){
        c_start=c_start + c_name.length+1;
        c_end=document.cookie.indexOf(";",c_start);
        if (c_end==-1) c_end=document.cookie.length;
        return unescape(document.cookie.substring(c_start,c_end));
      }
    }
    return "";
  }

  /**
   * Nastavenie cookie
   */
  function setCookie(c_name,value){
    var exdate=new Date();
    exdate.setDate(exdate.getDate()+this.expireDays);
    document.cookie=c_name+ "=" +escape(value)+
    ((this.expireDays==null) ? "" : ";expires="+exdate.toGMTString());
  }


  ///CONSTRUCTOR
  this.init_menu=init_menu;
  this.showMyChildBlock=showMyChildBlock;
  this.hideMyChildBlock=hideMyChildBlock;
  this.clickToSetMyChildren=clickToSetMyChildren;
  this.showContextMenu=showContextMenu;
  this.hideContextMenu=hideContextMenu;
  this.showAllMenuItems=showAllMenuItems;
  this.hideAllMenuItems=hideAllMenuItems;
  this.setBlockIdToCookie=setBlockIdToCookie;
  this.unsetBlockIdFromCookie=unsetBlockIdFromCookie;
  this.getMouseXY=getMouseXY;
  this.getMouseClickButtonId=getMouseClickButtonId;
  this.getCookie=getCookie;
  this.setCookie=setCookie;

  if(!Array.indexOf){
    Array.prototype.indexOf = function(obj){
      for(var i=0; i<this.length; i++){
        if(this[i]==obj){
          return i;
        }
      }
      return -1;
    }
  }

  /**
   * Osetrenie, opera nepozna oncontextmenu
   */
  this.onOperaContextMenu = function(e, box, dataElId) {    
    if(navigator.appName=="Opera"){      
      if (e.button == 2) {
        
        this.showContextMenu(e, box, dataElId);
        
      }
    }
  }

}