Help required to apply Visitor's Visa

[immihelp]

Hi ,

I am planning to sponsor Visitors / Tourist Visa for my parents. I have already scheduled the visa interview during first week of March 2010 and i am planning to ask my parents to travel during end of March.

I am on H1-B and the visa is expiring during Aug 2010. I am planning to ask my parents to mention that their intended period of stay in US is 6 months which is beyond my visa period. I will be applying for my visa entension through my company very soon. Please let me know if i should carry any document other than the mentioned ones in the immihelp site.
Also please let me know if there will be any issue in the above case during the visa interview.

Thanks for your help.

[immihelp]

1. Nothing else.
2. No.