var timer, i, menuId;

var dom = document.getElementById ? true : false;
var ie4 = ((document.all) && (!dom)) ? true : false;
var ns4 = document.layers ? true : false;
var opera = navigator.userAgent.indexOf('Opera') != -1 ? true : false;
var dhtml = dom ? true : ie4 ? true : ns4 ? true : false;


function setVisibility(element,newVisibility)
{ 
  if (dhtml)
  {
    if (dom) document.getElementById(element).style.visibility = newVisibility;
    else if (ie4) document.all[element].style.visibility = newVisibility;
    else if (ns4) eval('document.' + element + '.visibility = newVisibility');

	//if(newVisibility = 'hidden') UnHoverMenu(menu, color);
  }
}

function menu(polozek)
{
pocetpolozek=polozek;
  if (dhtml)
  {
    if (opera) for (i = 1; i <= pocetpolozek; i++) document.getElementById('hiddenMenu' + i).style.top = 20;
    if (ie4) for (i = 1; i <= pocetpolozek; i++) document.all['hiddenMenu' + i].style.top = 18;
    setVisibility('menuHolder','visible', '', '');
  }
}

function showMenu(id)
{
  if (dhtml)
  {
    clearTimeout(timer);
    for (i = 1; i <= pocetpolozek; i++) if (i != id) setVisibility((ns4 ? 'menuHolder.document.' : '') + 'hiddenMenu' + i,'hidden');
    setVisibility((ns4 ? 'menuHolder.document.' : '') + 'hiddenMenu' + id,'visible', '', '');
  }
}

function hideMenu(id, menu, color)
{
  if (dhtml)
  {
    menuId = (ns4 ? 'menuHolder.document.' : '') + 'hiddenMenu' + id;
	mmenu = menu;	
	ccolor = color;
	
    timer = setTimeout("setVisibility(menuId,'hidden');UnHoverMenu(mmenu, ccolor);",0);
  }
}

function dontHideMenu()
{
  if (dhtml) clearTimeout(timer);
}


function OpenPrintWindow(nazev){
	window.open('', nazev, 'width=660, height=500, scrollbars=1, resizable=1, menubar=1');
}


function OpenFotoWindow(nazev, ismenu){
	window.open('', nazev, 'width=660, height=500, scrollbars=1, resizable=1, menubar=' + ismenu);
}