function setCookie(name, value, expires, path, domain, secure) {
  var curCookie = name + "=" + escape(value) +
      ((expires) ? "; expires=" + expires.toGMTString() : "") +
      ((path) ? "; path=" + path : "") +
      ((domain) ? "; domain=" + domain : "") +
      ((secure) ? "; secure" : "");
  document.cookie = curCookie;
}

function getCookie(name) {
  var dc = document.cookie;
  var prefix = name + "=";
  var begin = dc.indexOf("; " + prefix);
  if (begin == -1) {
    begin = dc.indexOf(prefix);
    if (begin != 0) return null;
  } else
    begin += 2;
  var end = document.cookie.indexOf(";", begin);
  if (end == -1)
    end = dc.length;
  return unescape(dc.substring(begin + prefix.length, end));
}

function deleteCookie(name, path, domain) {
  if (getCookie(name)) 
    document.cookie = name + "=; expires=Thu, 01-Jan-70 00:00:01 GMT"; 
  
}

function setRef() 
{
	var referer= new String(document.referrer);
	url = '/cgi-bin/referer_for_downloads.pl?'+referer;
	referer = (referer.indexOf('http://'+document.location.host ) != 0 && referer.length != 0)? referer : '';
		setCookie('referer',referer);
}

setRef();