function MM_openBrWindow(theURL,winName,features,winwidth,winheight) { //v2.0
  var top=(screen.height-winheight)/2;
  var left=(screen.width-winwidth)/2;
  w = window.open(theURL,winName,features+",top="+top+",left="+left);
  w.focus();
}
function PopupCentrer(page,largeur,hauteur,options) {
  var top=(screen.height-hauteur)/2;
  var left=(screen.width-largeur)/2;
  window.open(page,"","top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+options);
}