function hideLayer(WichOne) {
    if (document.getElementById) {
      document.getElementById(WichOne).style.visibility = "hidden";
    }else if (document.all) {
      document.all[WichOne].style.visibility = "hidden";
    }else if (document.layers) {
      document.layers[WichOne].visibility = "hidden";
    }
  }
  
function getCookie(key)
{
    var cookieValue = null;

    if (key)
    {
        var cookieSearch = key + "=";

        if (document.cookie)
        {
            var cookieArray = document.cookie.split(";");
            for (var i = 0; i < cookieArray.length; i++)
            {
                var cookieString = cookieArray[i];

                // skip past leading spaces
                while (cookieString.charAt(0) == ' ')
                {
                    cookieString = cookieString.substr(1);
                }

                // extract the actual value
                if (cookieString.indexOf(cookieSearch) == 0)
                {
                    cookieValue = cookieString.substr(cookieSearch.length);
                }
            }
        }
    }

    return cookieValue;
}

function setCookie(key, val)
{
    if (key)
    {
        var date = new Date();

        if (val != null)
        {
            // expires in one year
            date.setTime(date.getTime() + (365*24*60*60*1000));
            document.cookie = key + "=" + val + "; expires=" + date.toGMTString();
        }
        else
        {
            // expires yesterday
            date.setTime(date.getTime() - (24*60*60*1000));
            document.cookie = key + "=; expires=" + date.toGMTString();
        }
    }
}