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//////////////////////////////////////////////////////////////
///
///  @class   Split Test / Referrer Cookie System
///  @brief   Chooses test group and sets referrer cookie
///  @note    Copyright (c) 2005 namesuppressed.
///  @author  Kohan Ikin / namesuppressed
///
///  @version 0.02
///  @date    06 September 2005
///
///  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
///  KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
///  WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
///  PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
///  OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
///  OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
///  OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
///  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
///
//////////////////////////////////////////////////////////////


//////////////////////////////////////////////////////////////
///  Javascript Cookie Functions.  This code courtesy of
///  Kent Briggs, Briggs Softworks <http://www.briggsoft.com/>
//////////////////////////////////////////////////////////////

function createCookie(name, value, days) {
   var expires = "";
   if (days) {
     var date = new Date();
     date.setTime(date.getTime()+(days*24*60*60*1000));
     expires = "; expires="+date.toGMTString();
   }
   document.cookie = name+"="+value+expires+"; path=/; domain=.namesuppressed.com";
}


function readCookie(name) {
   var nameEQ = name + "=";
   var ca = document.cookie.split(';');
   for(var i=0; i < ca.length; i++) {
     var c = ca[i];
     while (c.charAt(0)==' ') c = c.substring(1, c.length);
     if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
   }
   return null;
}


//////////////////////////////////////////////////////////////
///  Returns just the URI section of a given URL.
//////////////////////////////////////////////////////////////

function GetURI(url) {

  var parms = url.split("/");
  parms[0] = '';
  parms[1] = '';
  parms[2] = '';
  
  var uri = parms.join('/');
  return uri.substring(2);
}


//////////////////////////////////////////////////////////////
///  Returns just the Domain section of a given URL.
//////////////////////////////////////////////////////////////

function GetDomain(url) {

  var parms = url.split("/");
  if (parms.length >= 3) return parms[2];
  return "Unknown URL";
}


//////////////////////////////////////////////////////////////
///  Javascript Query String Functions.  This code courtesy of
///  About.com, http://javascript.about.com/library/blqs1.htm
///  and modified by Kohan Ikin, namesuppressed.com
//////////////////////////////////////////////////////////////

function GetReferrer() {

  // Initialize Array and null values
  var qsParm = new Array();
  qsParm['referrer'] = null;
  qsParm['ref']      = null;  
  qsParm['src']      = null;
  qsParm['aff']      = null;  

  var query = window.location.search.substring(1);
  var parms = query.split('&');
  for (var i=0; i<parms.length; i++) {
    var pos = parms[i].indexOf('=');
    if (pos > 0) {
      var key = parms[i].substring(0,pos);
      var val = parms[i].substring(pos+1);
      qsParm[key] = val;
    }
  }
  
  if (qsParm['referrer']) return qsParm['referrer'];
  if (qsParm['ref'])      return qsParm['ref'];
  if (qsParm['src'])      return qsParm['src'];
  if (qsParm['aff'])      return qsParm['aff'];
  if (document.referrer == '') return 'Unknown';
  return GetDomain(document.referrer);
}


function run() {
  if (!readCookie('referrer')) {

    var today  = new Date();
    var month  = today.getUTCMonth() + 1;
    var year   = today.getUTCFullYear();
    var day    = today.getUTCDate();
    var hour   = today.getUTCHours();
    var minute = today.getUTCMinutes();
    var second = today.getUTCSeconds();

    if (day < 10)    day    = '0' + day;
    if (month < 10)  month  = '0' + month;
    if (hour < 10)   hour   = '0' + hour;
    if (minute < 10) minute = '0' + minute;
    if (second < 10) second = '0' + second;

    var refpage   = escape(GetReferrer());
    var entrypage = escape(GetURI(document.location.href));
    var entrydate = escape(year + '-' + month + '-' + day + ' ' + hour + ':' + minute + ':' + second);

    createCookie('entrypage', entrypage, 90);
    createCookie('entrydate', entrydate, 90);
    createCookie('referrer',  refpage,   90);
  }
}


run();

// -->