function show(object) {
  if (document.getElementById) {
    document.getElementById(object).style.visibility='visible';
  } else if (document.all) {
    document.all[object].style.visibility='visible';
  }
}
function hide(object) {
  if (document.getElementById) {
    document.getElementById(object).style.visibility='hidden';
  } else if (document.all) {
    document.all[object].style.visibility='hidden';
  }
}
function OUVREpopup(page,nom,option) {
var w=window.open(page,nom,option);
w.document.close();
w.focus();
}

var Info = navigator.platform;
if (Info.indexOf("Mac") != -1){
document.write('<!-- MAC -->');
} else {
document.write('<!-- PC -->');	
}