function AbrirArticulo(documento){
ventana=open(documento,"nombre","width=620,height=460,left=10,top=10,toolbar=no,location=no,directories=no,scrollbars=yes,status=no,menubar=no,resizable=yes");
}

function Abrir640(documento){
ventana=open(documento,"nombre","width=640,height=480,left=0,top=0,toolbar=no,location=no,directories=no,scrollbars=yes,status=no,menubar=no,resizable=yes");
}

function Abrir400(documento){
ventana=open(documento,"nombre","width=400,height=440,left=20,top=20,toolbar=no,location=no,directories=no,scrollbars=yes,status=no,menubar=no,resizable=yes");
}