function OpenGame()
{
  mwin = window.open('http://www.losenicky.cz/main.php','main','width=550, height=400, top=20, left=20, directories=0, fullscreen=0, location=0, menubar=0, scrollbars=0, status=0, toolbar=0, resize=0');
  mwin.focus();
  return false;
}


function ShowHideSwf(event)
{
  elm = document.getElementById("swflayer");
  if (elm)
  {
    elm.style.display = elm.style.display==""?"none":"";
  }
}

function ShowSwf(event)
{
  elm = document.getElementById("swflayer");
  if (elm)
  {
    elm.style.display = "";
  }
}

function HidewSwf(event)
{

  elm = document.getElementById("swflayer");
  if (elm)
  {
    elm.style.display = "none";
  }

}

  function IsValidEmail(str)
  {

    if (str.indexOf("@")==-1 || str.indexOf(".")==-1)
    {
      return false;
    }
    else
    {
      return true;
    }

  }

function SOUTEZ_CheckForm (check_vars)
{

 var result = CheckForm(document.sform,check_vars);

 if (!IsValidEmail(document.sform.result_EMAIL.value))
 {
    alert("Zadejte prosím validní e-mail!");
    return false;
 }
 else
 {
    return result;
 }
 
}