function popitup(window_location, window_name,width,height){

 if(typeof popup == "object"  && !popup.closed){
   popup.document.close();
    popup.document.write("Veuillez patienter S.V.P.<br>Chargement en cours ...");
    popup.document.close();		
    changeLocation(popup,window_location);
  } else {
    popup = window.open(window_location,window_name,"resizable=1,scrollbars=1,status=1,width="+width+",height="+height);
  }
  if(typeof popup == "object"){
    popup.focus();
    return 1;
  } else {
   return 0;
  }

}