function enviar(url)
{
    window.open('enviar.php?url=' + url, 'enviar', 'toolbar=no, scrollbar=no, menu=no, width=450, height=275');
}

function imprimir(url)
{
    window.open(url + '&imprimir=1', 'imprimir', 'toolbar=no, menu=no, scrollbars=yes, resizable=yes, maximize=yes, width=450, height=450');
}