How can I limit table size

[Rob Rowsome]

I am using a MyISAM table to store server logs from my website. The problem is, the table grows fast, and quickly becomes unwieldy. I want to limit the total number of rows, while still allowing new data to be inserted, so that the oldest rows are deleted to make room for new rows. Do I need to use a trigger for this? I tried setting the "Max Rows" option, but it doesn't do what I want. Is there an easy way to do this? Thanks.