Auto mail from Excel to Outlook based on date in cell

Dear All,

I am creating a tracker file for Purchase Orders in which end date in column 'J' is very important.
Column 'J' has following conditional formatting
1. If cell date is in between todays date + 14 days --- YELLOW
2. cell date <= today's date ------------------------- RED
3. cell valus > today + 14 days ---------------------- GREEN

So now when the cell turn Yellow I want the excel should send the mail to the concerned person whose mail id will be mentioned in same row of column 'G'

One more requirement there should be two mails. Reminder 1 & Reminder 2.

I use officer 2010 & mail is outlook 2010 & OS is windows 7.
This file will be on share point. This file may not be opened everyday.

Please reply with the procedure as I am not a programming/ IT person... I may not understand all terms.. please try to simplify the response.
Thanks in advance for all the help.