// Browser check, cookie check
var isPreNN6 = (navigator.appname == "Netscape" && pareInt(navigator.appVersion) <= 4);
var noCookieFlag = 0;

function getCookieVal (offset) {
  var endstr = document.cookie.indexOf (";", offset);
  if (endstr == -1)
    endstr = document.cookie.length;
  return unescape(document.cookie.substring(offset, endstr));
}

function FixCookieDate (date) {
  var base = new Date(0);
  var skew = base.getTime(); // dawn of (Unix) time - should be 0
  if (skew > 0)  // Except on the Mac - ahead of its time
    date.setTime (date.getTime() - skew);
}

function GetCookie (name) {
  var arg = name + "=";
  var alen = arg.length;
  var clen = document.cookie.length;
  var i = 0;
  while (i < clen) {
    var j = i + alen;
    if (document.cookie.substring(i, j) == arg)
      return getCookieVal (j);
    i = document.cookie.indexOf(" ", i) + 1;
    if (i == 0) break; 
  }
  return null;
}

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

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

// Get existing cookie values for PHuid and PHsessionID
if ( GetCookie("PHuid") ) { randomID = GetCookie("PHuid"); }
else { randomID = "PHuid"; for (i = 0; i <= 30; i++) { randomID += Math.floor(Math.random()*10)} }
if ( GetCookie("PHSessionID") ) { sessionID = GetCookie("PHSessionID"); }
else { sessionID = "PHSessionID"; for (i = 0; i <= 24; i++) { sessionID += Math.floor(Math.random()*10)} }

// Set cookie for uid - default 1 year (permanent)
var expdate = new Date();
FixCookieDate (expdate);
expdate.setTime (expdate.getTime() + (365 * 24 * 60 * 60 * 1000)); // expires 365 days from now 
SetCookie ("PHuid", randomID, expdate);

// Set cookie for session - default 20 minutes
var expdate = new Date();
FixCookieDate (expdate);
expdate.setTime (expdate.getTime() + (20* 60 * 1000)); // expires 20 minutes from now
SetCookie ("PHSessionID", sessionID, expdate);

// Write a image link so the web log records the data.
document.writeln ('<img src="/images/white.gif?uid=' + randomID + '&location=' + document.URL + '&referrer=' + document.referrer + '&sessionid=' + sessionID + '" height="1" width="1" alt="">');