function otvarak(url,sirka,vyska,meno){
	var d_sirka=screen.availWidth;
	var d_vyska=screen.availHeight;
	var kam_x=(d_sirka - sirka) / 2;
	var kam_y=(d_vyska - vyska) / 2; 
	eval("window.open(url,meno,'resizable=no,width=" + sirka + ",height=" + vyska + ",left=" + kam_x + ",top=" + kam_y + ",screenX=" + kam_x + ",screenY=" + kam_y + ",scrollbars=no,titlebar=no')");
}

function otvarak2(url,sirka,vyska,meno){
	var d_sirka=screen.availWidth;
	var d_vyska=screen.availHeight;
	var kam_x=(d_sirka - sirka) / 2;
	var kam_y=(d_vyska - vyska) / 2; 
	eval("window.open(url,meno,'resizable=yes,width=" + sirka + ",height=" + vyska + ",left=" + kam_x + ",top=" + kam_y + ",screenX=" + kam_x + ",screenY=" + kam_y + ",scrollbars=yes,titlebar=no')");
}

function validateg(formular) {
	if (formular.nick.value=="")
	{
		alert("Meno musí byť zadané");
		formular.nick.focus();
		return false;
	}

	if (formular.hdp.value=="")
	{
		alert("Heslo musí byť zadané");
		formular.hdp.focus();
		return false;
	}
	else
		document.los.submit();
}

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;

if (dhtml) document.write ('<style type="text/css">#menuHolder {position: relative; visibility: hidden; z-index: 1;} #hiddenMenu1, #hiddenMenu2 {position: absolute; visibility: hidden;} #visibleMenu1 {position: absolute; left: 0px; top: 0px;} #visibleMenu2 {position: absolute; left: 51px; top: 0px;} #hiddenMenu1 {left: 0px; top: 21px;} #hiddenMenu2 {left: 51px; top: 21px;} </style>');

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');
  }
}

function menu()
{
  if (dhtml)
  {
    if (opera) for (i = 1; i <= 2; i++) document.getElementById('hiddenMenu' + i).style.top = 0;
    if (ie4) for (i = 1; i <= 2; i++) document.all['hiddenMenu' + i].style.top = 18;
    setVisibility('menuHolder','visible');
  }
}

function showMenu(id)
{
  if (dhtml)
  {
    clearTimeout(timer);
    for (i = 1; i <= 2; i++) if (i != id) setVisibility((ns4 ? 'menuHolder.document.' : '') + 'hiddenMenu' + i,'hidden');
    setVisibility((ns4 ? 'menuHolder.document.' : '') + 'hiddenMenu' + id,'visible');
  }
}

function hideMenu(id)
{
  if (dhtml)
  {
    menuId = (ns4 ? 'menuHolder.document.' : '') + 'hiddenMenu' + id;
    timer = setTimeout("setVisibility(menuId,'hidden')",50);
  }
}


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