MOuse button dependant macro

[Kendian]

I used to have the script for macros so I could use (at least) 3 spells/items/abilities on each button, depending on whether I used right/middle/left button on my mouse. I can't find the script anywhere, and I'd rather not use an addon when a macro would do. Can anyone help me remember the format for the button dependant macros, lol? Please?