xiti_redirect.js

/***
 * How to use it in your html page :
 * copy the code and paste it in your page and update param passed to 
 * Figaro.redirectUrl to desired page. So, Figaro.redirectUrl will 
 * return new calculated URL.
 *
 * - Calculated link to pass through
 *  <a href="#" onclick="window.location.replace(Figaro.redirect)">
 *    Pass this ad
 *  </a>
 *
 * - Automatically redirected after 4 seconds
 *  <script>
 *    setTimeout(function(){
 *      window.location.replace(Figaro.redirectUrl);
 *    },4000);
 *  </script>
 *
 ***/

if(typeof window.Figaro == "undefined")
  Figaro = {}

Figaro.redirectUrl = (function(url){
  var xtref = encodeURIComponent(document.referrer),
    xtor = document.location.search.match(/[?|&]xtor=([^&]+)/) || 
      document.location.hash.match(/^#xtor=(.+)$/) || "";
  if (xtor != "") xtor = "&xtor=" + xtor[1];
  return xtref ? (url + "?xtref=" + xtref + xtor) : url;
})("http://www.lefigaro.fr/")