Removing Non-numeric characters from Alpha-numeric string

Hi,

I have one column in which i have Alpha-numeric data like

COLUMN X

-----------------------

+91 (876) 098 6789

1-567-987-7655

.

.

.

.

so on.

I want to remove Non-numeric characters from above (space,'(',')',+,........)

i want to write something generic (suppose some function to which i pass the column)

thanks in advance,

Mandip