CSsource - double binding?

[badbadtz560]

In the old cs, you could set two keys to do the same job.. for instance.. q and mouse4 would be the quick swap on weapons

does anyone know how to do this in source? i used to just goto options and keyboard.. but it only lets me use one key for the weapon swap.

 

[SouLXIV]

It's bind "mwheeldown +inserthere; +inserthere"