// Funkce pro praci s Cookie
function GetCookie(sName)
{
  if (document.cookie.length == 0) return null;  
  var aCookie = document.cookie.split("; ");
  for (var i=0; i < aCookie.length; i++)
  {
    var aCrumb = aCookie[i].split("=");
    if (sName == aCrumb[0]) 
      return unescape(aCrumb[1]);
  }
  return null;
}

function DelCookie(sName)
{
  document.cookie = sName + "=; expires=Fri, 21 Dec 1976 04:31:24 GMT;";
}

function SetCookie(sName, sValue)
{
  document.cookie = sName + "=" + escape(sValue) + "; expires=Fri, 31 Dec 2099 23:59:59 GMT;";
}