function clickclear(thissearch, defaulttext) {
if (thissearch.value == defaulttext) {
thissearch.value = "";
}
}
function clickrecall(thissearch, defaulttext) {
if (thissearch.value == "") {
thissearch.value = defaulttext;
}
}

function ShowHide(element){
		el=document.getElementById(element).style; 
		el.display=(el.display == 'block')?'none':'block';
}

function refresh()
{
		var TimeElement = document.getElementById('odpocet').innerHTML = '30:00';
		cislo = 1800;	
		odpocitavej();

}
var cislo = 1800;
function odpocitavej()
 {
  window.document.getElementById("odpocet").innerHTML = Math.floor(cislo/60) + ":" + cislo%60;
  cislo = cislo-1;
  if (cislo < 0) 
  {
  	//alert("Byli jste odhlášeni");
  	window.location.href="/admin/index.php";
  } 
  else
  {
  	window.setTimeout("odpocitavej()", 1000);
  }
 }
// JavaScript Document