function changeImage(code, num, nb){
    var champs = eval('document.all.zpub_'+nb);
    var cchecked = eval('document.all.interface_'+nb);
    champs.src = 'http://www.xponsor.com/v3/images/captures/'+code+'_zp'+num+'.jpg';
    cchecked[num-1].checked = true;
    return false;
}