conditional validation?

[wasted]

Hey. I've got a portal where you can enter in payment tender (checks cash credit etc) I want entering the information to be nice and smooth. But I'm trying to make Filemaker prompt you if you try to modify it. I was thinking I could do that with a calculation validation, but my brain can't seem to figure out how. Am I on the right track? Anybody know of a way to do this? Thanks.

[PoweredbyFm7]

You can do this with a script. But you set the field you want to protect as button. if the field is empty, you can enter data, otherwise no. You can download your sample file from below link:

http://www.fmpforum.com/cgi-bin/ikonboard.cgi?;act=ST;f=29;t=6;r=1

[wasted]

Thanks, but that won't work. My users tab through everything. It's frustrating. They refuse to click, and I never have a place to start a script from.

Ben

[-Queue-]

You could do it with a validation, but it will only appear after they try to modify it. You might do better limiting access based on the field being empty, under File -> Define Accounts & Privileges.