// JavaScript Document
//preloading
function Preload(image,position){ 
 document.imageArray=new Array;
 document.imageArray[position]=new Image;
 document.imageArray[position].src=image;
}
Preload('images/webicons/close2.png',2);
Preload('images/webicons/close3.png',3);
Preload('images/menu/plus.gif',4);
Preload('images/menu/nic.gif',5);
Preload('images/menu/minus.gif',6);
Preload('images/menu/vetev.gif',7);
Preload('images/menu/konec.gif',8);
Preload('images/menu/dolu.gif',9);
Preload('images/menu/vetev_konec.gif',10);
Preload('images/menu/minus_konec.gif',11);
Preload('images/menu/plus_konec.gif',12);

/*detekce prohlížeče*/
var ie = document.all && document.fireEvent && document.createComment;
var ff = !document.all && document.getElementById;
/*funce pro menu*/
function oz(co){
 if(readCookie(co)=='1'){
  Zmiz(co+'_1');
  MenuChangeImage(co+'_0','plus');
  writeCookie(co,'0',10);
 }
 else{
  Objev(co+'_1');
  MenuChangeImage(co+'_0','minus');
  writeCookie(co,'1',10);
 }
}
function ozk(co){
 if(readCookie(co)=='1'){
  Zmiz(co+'_1');
  MenuChangeImage(co+'_0','plus_konec');
  writeCookie(co,'0',10);
 }
 else{
  Objev(co+'_1');
  MenuChangeImage(co+'_0','minus_konec');
  writeCookie(co,'1',10);
 }
}
//při odkazech
function alt_oz(co){
  Objev(co+'_1');
  MenuChangeImage(co+'_0','minus');
  writeCookie(co,'1',10);
}
function alt_ozk(co){
  Objev(co+'_1');
  MenuChangeImage(co+'_0','minus_konec');
  writeCookie(co,'1',10);
}


function reload_menu(co){
 if(readCookie(co)==""){
  Zmiz(co+'_1');
  MenuChangeImage(co+'_0','plus');
  writeCookie(co,'0',10);
 }
 if(readCookie(co)=='0'){
  Zmiz(co+'_1');
  MenuChangeImage(co+'_0','plus');
 }
 else if(readCookie(co)=='1'){
  Objev(co+'_1');
  MenuChangeImage(co+'_0','minus');
 }
}
function reload_menuk(co){
 if(readCookie(co)==""){
  Zmiz(co+'_1');
  MenuChangeImage(co+'_0','plus_konec');
  writeCookie(co,'0',10);
 }
 if(readCookie(co)=='0'){
  Zmiz(co+'_1');
  MenuChangeImage(co+'_0','plus_konec');
 }
 else if(readCookie(co)=='1'){
  Objev(co+'_1');
  MenuChangeImage(co+'_0','minus_konec');
 }
}

/*další funkce*/
//fce pro Message
function ChangeBut(what,source){
 document.getElementById(what).src=source;
}
function SendForm(what){
 document.forms[what].submit();
} 

function MenuChangeImage(prvek,image){
 document.getElementById(prvek).style.backgroundImage="url('images/menu/"+image+".gif')";
}

function Zmiz(what){
 document.getElementById(what).style.display="none";
}

function Objev(what){
 document.getElementById(what).style.display="block";
}

function writeCookie(name, value, hours){
  var expire = "";
  if(hours != null)
  {
    expire = new Date((new Date()).getTime() + hours * 3600000);
    expire = "; expires=" + expire.toGMTString();
  }
  document.cookie = name + "=" + escape(value) + expire;
}

function readCookie(name){
  var cookieValue = "";
  var search = name + "=";
  if(document.cookie.length > 0)
  { 
    offset = document.cookie.indexOf(search);
    if (offset != -1)
    { 
      offset += search.length;
      end = document.cookie.indexOf(";", offset);
      if (end == -1) end = document.cookie.length;
      cookieValue = unescape(document.cookie.substring(offset, end))
    }
  }
  return cookieValue;
}