function em(name, host, domain, subj, cc, body) {
    str = 'mailto:' + name + '@' + host + '.';
        if (domain == "c"  ||  domain == "C")
                domain = "com";
        else if (domain == 'o'  ||  domain == 'O')
                domain = "org";
        else if (domain == 'n'  ||  domain == 'N')
                domain = "net";
        else if (domain == 'e'  ||  domain == 'E')
                domain = "edu";
        // else use "domain" as is

        str += domain;
    if (subj != null) {
        str += '?subject=' + subj;
    }
    if (cc != null) {
        str += '&cc=' + cc;
    }
    if (body != null) {
        str += '&body=' + body;
    }

    window.location.replace(str);
}