Actionscript targetting an iframe

I got a flash navigation system with this as on frame 1

_root.connURL10 = ‘
_root.connURL12 = ‘
_root.connURL14 = ‘

The buttons work with no problem, but I want to target every page to open on an iframe on the page, the same way I normally do it with the getUrl syntax.
Can any of the programming gurus here help plesase? Thanks in advance