function ventana(ventana) 
    {
     ventana=window.open(ventana,'ventana','resizable=no,toolbar=no,scrollbars=yes,status=no,width=528,height=400')
    }

      function linkOmatic(sel, top) {
        top.location.href = sel.options[sel.selectedIndex].value
      }

 function boletines(boletines) 
    {
     ventana=window.open(boletines,'ventana','resizable=yes,toolbar=no,scrollbars=yes,status=no,width=620,height=400')
    }

      function linkOmatic(sel, top) {
        top.location.href = sel.options[sel.selectedIndex].value
      }
 function monitoreo(monitoreo) 
    {
     ventana=window.open(monitoreo,'ventana','resizable=yes,toolbar=no,scrollbars=yes,status=no,width=620,height=400')
    }

      function linkOmatic(sel, top) {
        top.location.href = sel.options[sel.selectedIndex].value
      }