function setCookie(name, value, exp_y, exp_m, exp_d, path, domain, secure)
{
  var cookie_string = name + "=" + escape(value);

  if (exp_y)
  {
    var expires = new Date(exp_y, exp_m, exp_d);
    cookie_string += "; expires=" + expires.toGMTString();
  }

  if (path)
        cookie_string += "; path=" + escape(path);

  if (domain)
        cookie_string += "; domain=" + escape(domain);
  
  if (secure)
        cookie_string += "; secure";
  
  document.cookie = cookie_string;
}

function deleteCookie(cookie_name)
{
  var cookie_date = new Date();  // current date & time
  cookie_date.setTime(cookie_date.getTime() - 1);
  document.cookie = cookie_name += "=; expires=" + cookie_date.toGMTString();
}

function getCookie(cookie_name)
{
  var results = document.cookie.match('(^|;) ?' + cookie_name + '=([^;]*)(;|$)');

  if (results)
    return (unescape(results[2]));
  else
    return null;
}