All you need do is set the link code to activate instructions for loading two frames. below is the instructions I have for loading info into two frames from a web page I designed some time back. The best way to provide this isntruction is to have the link opne, but not display another page which immediately opens the two you want loaded.
In this example I have the 'default' page that opens the 'main' page which then opens the two pages wanted. You would need to amend the code of the default page as it is also setting up the two sub frames that are then loaded by 'main'
Default page code
html>
file:///G:/CSC/CIT Students/ClarifyWeb/ClarifyStart.html
Web page created by E.Bywater on 26 May 2000
Last updated on 9 June 2000