<!--ventana flotante
new_window=null;
function start_window(url){
  if (new_window==null){
    new_window = null;
  }
  else {
    new_window.close();
        new_window=null;
  }
  new_window = window.open(url, "NewWindow", "directories=no, menubar=no, resizable=no, top=0, left=0,width=358,height=586");
  new_window.focus();
  
}
//-->