function compartir(event, enlace, w, h) {
    evento = event || window.event;
    evento.stopPropagation();
    return ventanaPop(enlace, w, h);
}

function ventanaPop(enlace, w, h) {
    var ancho = w || 550;
    var alto = h || 450;
    var left = Math.round((screen.width/2) - (ancho/2)), top = Math.round((screen.height / 2) - (alto/2))
    window.open(enlace.href, 'share', 'left='+left+',top='+top+',width='+ancho+',height='+alto+'toolbar=no, personalbar=0, scrollbars=1');
    return false;
}