function setCookie(cookieName, cookieValue, cookiePath, cookieExpires)
      {
        cookieValue = escape(cookieValue);
        if (cookieExpires == "")
          {
            var nowDate = new Date();
            nowDate.setMonth(nowDate.getMonth() + 6);
            cookieExpires = nowDate.toGMTString();
          }

        if (cookiePath != "")
          {
            cookiePath = ";Path=" + cookiePath;
          }

       document.cookie = cookieName + "=" + cookieValue + ";expires=" + cookieExpires + cookiePath;
      }

    function getCookieValue(name)
      {
        var cookieString = document.cookie;
        var index = cookieString.indexOf(name + "=");

        if (index == -1) return null;

        index = cookieString.indexOf("=", index) + 1;
        var endstr = cookieString.indexOf(";", index);

        if (endstr == -1) endstr = cookieString.length;

        return unescape(cookieString.substring(index, endstr));
      }

	function OpenWin(URL, winName, width, height, scroll)
		{
			var winLeft = (screen.width - width) / 2;
			var winTop = (screen.height - height) / 2;

			winData = 'height='+height+',width='+width+',top='+winTop+',left='+winLeft+',scrollbars='+scroll+',resizable';
			win = window.open(URL, winName, winData);

			if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
		}


  function DoPopupNL()
    {
      var NL = getCookieValue('site_newsletter');

      if(NL == null)
        {
          // Show the newsletter signup popup
          setCookie('site_newsletter', 'true', '', '');
          OpenWin('popupnl.php', 'popupNL', 400, 150, 'no');
        }
    }