Copy String Of Values From Form

I have a form which displays contact details for customers. I want to add a button to the form which concatenates name and address fields, adding spaces and line breaks, and then copies the full name and address so that it can be pasted into other applications (e.g. into a letter).

To do this requires that I implement some code to perform the following actions, but I can't figure out how to do it. Can anyone help?

1. Check Title field. If it is not null, take it's value and add a space after it.
2. Check First Name field. If it is not null, take it's value add it to the output of step 1 and add a space after it.
3. Check Surname field. If it is not null, take it's value and add it to the output of step 2 and add a space and a line break after it.
4. Check the Company Name field. If it is not null, add it's value after the line break and add another line break.
5. Repeat this for every field until the end of the address is reached, then copy the result.

Thanks in advance if anyone can help.

Gary