Generate public key from numbers

I am using RSA in javascript from: http://www-cs-students.stanford.edu/~tjw/jsbn/

And on their demo page, it is able to generate the keys required: http://www-cs-students.stanford.edu/~tjw/jsbn/rsa2.html

But what I don't understand, is how to turn their key, which is a few variables, of hex strings, into a string that looks like a private/public key string.

Their output looks like this...

Modulus (hex):
a32464be9bef16a6186a7f29d5ebc3223346faab91ea10cc00e68ba26322a1b0
3dc3e1ec61832fca37ed84018db73ae6b79bd8f3fa2945c8606766402658d0c1

Public exponent (hex, F4=0x10001):
10001

Private exponent (hex):
c3f5730d81402e7453df97df2895884e0c49b5cf5ff54737c3dd28dc6537b3fd
8b0eb2fd82148ebbf81fe16128ec1ebf39fd9a6e62d42aad245b172f4ed8661

P (hex):
f542cdc91f73747ecc20076962a2ed91749b8e0af66693ba6f67dd92f99b1533

Q (hex):
aa491917d8b05a75db7a5c1f6b592b0f0a9bb30a530cbef44ae233b9bf3d5a3b

D mod (P-1) (hex):
e5bfbea639201e70e926d7ca90ebaf4022cbd533cfbe2784edf78e48b029e6a1

D mod (Q-1) (hex):
3e3e17d8fa9083903ed83be21427f4b03bcd6ba523742e3c373ef56f38b2e14f

1/Q mod P (hex):
d93a8828e23458c2115fc1dd003274485af1483e8ec35866d5cffd214c5f853e

I expect a private key to look something like this...

-----BEGIN RSA PRIVATE KEY-----
MIIBOQIBAAJBALH5w2R5Zl3hHoH7zDF6i5IbO7W1Ry9bT2bxTy2sJa7mZC+p3rQG
YNrX+M/KuOUuVqFaohrWLwU28+VlFjFHG5MCAwEAAQJAFZCi+Viwa62saamd+1zS
7pg4KvNVNcrFmz6gDnOueTujcBdaNfxOzWy39SxSOtPe62qYHPculci/QiJfLvOf
MQIhAOqxj69QPRqervf6ARMI1zV0+UAGA1tWgOeU7NH0U9vLAiEAwiIJu+986PKT
qmjAKDFx3OJxUuEay8kJ5apDjC6s1lkCIBVRdazGDBbb7SbHRcu11N6dNnrTUQC9
9c2TYIOdvvRLAiB7bbDKsKW2ZiTEv/0MkQNX8REkJMMothV41BxGUJbLYQIgF/yA
54gqfRtj3aPB6lDETMOZbZIWgNpn8hU2kFGdlIs=
-----END RSA PRIVATE KEY-----

The private and public keys you are familiar with are in a format called PEM. PEM refers to the header and footer wrapping base64 encoded data.

The encoded binary data is in the DER (Distinguished Encoding Rules) format of ASN.1 (Abstract Syntax Notation One).

Here's a javascript ASN.1 decoder. http://lapo.it/asn1js/

The public and private keys contain the modulus and either the public or private exponent respectively.