There was another religion in India which eventually merged into Buddhism and Jainism

No. Not quite Hinduism.
I am not sure but I think the name started with A if I remember correctly.
Nevermind. I found it. It was called Ajivika. You lot can still tell me about it if you like

Hinduism.

Worship "in Spirit" unifies ALL religions... since that is done in stillness and surrender. Let thy will be done unifies all religions.

here we go sweetie
took me a few tries through a couple of go ogle hits to find it
Ajivika

http://en.wikipedia.org/wiki/Ajivika


edit
aha you got it Lil
I am always too slow

You will find that Hinduism was the 'original'; it spawned Buddhism and Jainism in about 500 BC.

"Three major movements underpinned the nuisance of a new epoch of Hindu thought: the advents and spread of Upanishadic, Jaina, and Buddhist philosophic-religious thought throughout the broader Indian landmass."

[edit]
It seems Ajivika came into existence (again - from Hinduism) at about the same time as Jainism and Buddhism.

Sihkk...