yes, you can!
My H1 had expired when my MIL applied for a visa. She got the visa.
In the Affidavit of Support, fill in your A number.
Include the following docs:
1) Copy of 485 receipt notice
2) Copy of passport, EAD
3) Letter from your employer
4) A letter to the Consulate General in India
5) A letter 'inviting' your parents to the US
6) Statement of Account from your bank
If they can show proof of strong ties in India (Proof of real estate, etc), that will be good.