Change data in a field

[kabkal]

To simplify the problem, lets say the following is a web page:

state: [_CA__] {field called txt_nx1}
age: [__23___] {field called txt_nx2}

the next time I go to the web page with data it looks like this:

state: [_AZ__] {field called txt_nx3}
age: [__12___] {field called txt_nx4}
height: [___3'6"___] {field called txt_nx5}

I would like to be able to set text on these fields. Normally this would be easy, but the names change as does the number of fields.

Thanks!