var numreg = LireCookie("numregroupement");
if (numreg != "0"){
        xt_an = numreg;
}else{
        xt_an="";
}
xt_ac = ""; //category
//do not modify below

if (window.xtparam!=null){
        window.xtparam+="&ac="+xt_ac+"&an="+xt_an;
}else{
        window.xtparam="&ac="+xt_ac+"&an="+xt_an;
};