Can I go to India once H1B-visa filled

My L1B-visa and i94 expires on 31st May 2013 ,

[b]1. I am planning to file H1B-visa. Can I go back to India once my L1B-visa  expired and get H1B-visa from  India? Can I travel to India while H1B-visa in process and H1B from India?[/b]

Yes, this can be done. Once you leave, USCIS will continue to process your H-1. Once approved, you can appear for H-1 visa stamping and then return to US on H-1 around Oct 1.