pop up window

I desperately need the assistance of this group. I have let my javascript skills freeze in the year 2000. Now I can't make this work in Drupal as it is obvioulsy using techniques far more advanced.

I am attempting to get a pop up window to work from a menu item. The window would open a flash audio player.

I have gotten something to almost work from a node, but can't seem to get this to work from a menu item.

So, how do I open a sized new window from a menu item in Drupal?