function ecrire_cookie(nom, valeur, expires) {
	var expDate = new Date();
	expDate.setTime(expDate.getTime() + (2 * 3600 * 1000));

	var rf = getVar("ref_or");

	if( rf=="0" ) {
	//alert("pas ecrire");
	} else {
  document.cookie=nom+"="+escape(valeur)+
  ((expires==null) ? ("; expires="+expDate.toGMTString()) : ("; expires="+expires.toGMTString()));
	}
}

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

function lire_cookie(nom) {
  var arg=nom+"=";
  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 arguments_cookies(j);
    i=document.cookie.indexOf(" ",i)+1;
    if (i==0) break;
  }
  return null; 
}

function getVar (nomVariable)
{
var infos = location.href.substring(location.href.indexOf("?")+1, location.href.length)+"&"
if (infos.indexOf("#")!=-1)
infos = infos.substring(0,infos.indexOf("#"))+"&"
var variable=0
{
nomVariable = nomVariable + "="
var taille = nomVariable.length
if (infos.indexOf(nomVariable)!=-1)
variable = infos.substring(infos.indexOf(nomVariable)+taille,infos.length).substring(0,infos.substring(infos.indexOf(nomVariable)+taille,infos.length).indexOf("&"))
}
return variable
}