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">#scriptSupport {display: none;} #menuHolder {position: relative; visibility: hidden; z-index: 1;} ' + (!ns4 ? '#menuHolder a {width: 100%;}' : '') + ' #hiddenMenu1, #hiddenMenu2, #hiddenMenu3, #hiddenMenu4, #hiddenMenu5 {position: absolute; visibility: hidden;} #visibleMenu1 {position: absolute; left: 0px; top: 0px;} #visibleMenu2 {position: absolute; left: 70px; top: 0px;} #visibleMenu3 {position: absolute; left: 154px; top: 0px;} #visibleMenu4 {position: absolute; left: 244px; top: 0px;} #visibleMenu5 {position: absolute; left: 301px; top: 0px;} #hiddenMenu1 {left: 0px; top: 15px;} #hiddenMenu2 {left: 70px; top: 15px;} #hiddenMenu3 {left: 154px; top: 15px;} #hiddenMenu4 {left: 244px; top: 15px;} #hiddenMenu5 {left: 301px; top: 15px;}</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 <= 5; i++) document.getElementById('hiddenMenu' + i).style.top = 20;
	if (ie4) for (i = 1; i <= 5; i++) document.all['hiddenMenu' + i].style.top = 18;
	setVisibility('menuHolder','visible');
  }
}

function showMenu(id)
{
  if (dhtml)
  {
	clearTimeout(timer);
	for (i = 1; i <= 5; 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);
}

function highlight(img) {
	document.images[img].src = "http://webtest.vslib.cz/gf/" + img + "2.gif";
}

function unhighlight(img) {
document.images[img].src = "http://webtest.vslib.cz/gf/" + img + ".gif";
}

function check () {
	if (document.telefon.query.value == "") {
		alert("Zadejte príjmení hledané osoby!")
	}
	else {
		document.telefon.submit()
	}
}