looping with dates

I have a worksheet with 2 columns, row 1 is the header and row 2 will be information and date.
What I then need to do is check that if thre is anything in the next row (A3) if so then (B3) will be the same date as (B2), I need to do this untill Column A has a blank row

Hope this is comprehensible?

Using excel 2000

Many thanks
John