Delete all alpha characters EXCEPT numeric (numbers)

[dmac]

I want to delete all the alpha characters, but leave the numeric chars only.
Is this possible?

Many thanks,
Darren.

[ak47wong]

Perform a Replace operation with these parameters:

Find what: [^0-9]
Replace with: (nothing)
Select Regular expression
Click Replace All

[dmac]

Thanks for this ak,
Much appreciated!