function Ventana_001 (URL){ 
  window.open(URL,"UTERRA","width=500,height=300,top=300,left=40,scrollbars=NO,titlebar=NO,menubar=YES,toolbar=NO,directories=YES,location=YES,status=NO,resizable=NO") 
} 
function Ventana_002 (URL){ 
  window.open(URL,"UTERRA","width=300,height=400,top=50,left=100,scrollbars=NO,titlebar=NO,menubar=NO,toolbar=NO,directories=YES,location=NO,status=NO,resizable=NO") 
} 
function ventana_imagen (URL){ 
  window.open(URL,"Imagen","width=450,height=550,top=20,left=20,scrollbars=yes,titlebar=no,menubar=no,toolbar=no,directories=no,location=no,status=no,resizable=yes") 
}