5 yrs of H1

[switch]

Hi, If I complete 5 yrs on H1 during residency and find an employer for the 6th year who is willing to file for a green card then;

1) Can the employer file for green card before I start working for him(someone told me that unless I start working for the employer, the employer can not file for green card.)?

2) In what time frame does the employer have to file the green card, so that I can keep on getting extensions of H1 till Green card is approved(i.e. does it have to be >365 days before the start of the 6th year?)

Thanks.

[Emma121]

The H1B visa stamp in my passport (from an earlier employer) has been expired for
more than 2 years. I am planning on visiting India and would like to get a new H1B
visa stamp in my passport from the US consulate in Chennai. Will I have any problems
getting a visa stamp because of the 6-yr limit?