Blank out a box in a form if this one is filled in

[Anna]

Hi guys

First time poster here!

I used to be quite good at access, but just having another go after many years of not using it. Hopefully this isn't a difficult one..

In a form (Contact Details)

I have a combo box with a value list (Access type) - the list being Type A and Type B.

Then I have the following fields
Type A IP Address
Type A UserID
Type A Password
Type B UserID
Type B Password

My question is this...

When Type A is chosen in Access Type,
I want the user to enter details in
Type A IP Address
Type A UserID
Type A Password

But not in the Type B UserID, or Type B Password fields

When Type B is selected in Access Type
I want the user to enter details in
Type B UserID
Type B Password

Is there a way of hiding or greying out the fields I don't want them to type in?

Your help with this is really appreciated.

Thanks