What is a good way to change fields in livecycle-documents without triggering validations?

Question

I got a form with lots of fields and many scripts so I broke it down to my very fundamental problem with this example:

Before printing I check if everything is filled out with:

Seite1.execValidate();

The validate XML source of the field:

<validate nullTest="error" scriptTest="error"/>

When clicking on the top-button I want different things to happen. For example:

field.rawValue  =   "";

or (if it's a decimal field)

//isPauschal was set earlier to either true or false
field.value.decimal.leadDigits  =   (isPauschal)?"4":"2";

But then this happens:

Field goes blue (=it is empty) when setting its value to "" - this I want only to happen when I'm validating with the print-button. Now I found a workaround:

field.mandatory =   "";
field.rawValue  =   "";
field.mandatory =   "error";

But if I were to write this every time I changed something that would trigger this my code would look pretty bad and much more confusing.

Can someone help me? What could I do to easily validate my fields before printing and still being able to change them around with js at runtime without them making strange colors. ;) I don't want to validate them individually - I wish to keep something like the execValidate() command so it automatically checks all the fields in a subform.

Let me know if you need any more information!