Control between multiple frames

I have a need for three frames on one page. Two are on the top half. The left side displays a list of companies from an MySQL table, on th rigt side is a list of individuals working at these companies.

How do I take a click in the upper left frame and update the upper right frame with only the individuals who work for a particular company.

Thank you
George

Name your frames (in your <FRAME> tag, give them names) then add TARGET="framename" to your link so it should look something like this:

<A HREF="employees.cgi" TARGET="topright">Employees</A>

you can also put TARGET in a <FORM> tag if you are using a form.