Help with Dynamic Action Construction

Question

I want to create a dynamic action that will disable a field called P1_TBRN when any of the following conditions in the form are true:
:P1_TRIAL_STATUS in ('Off-Trial','Unknown') or
:P1_DIAGNOSIS_MAJOR ='UNKNOWN' or
:P1_INSTITUTION ='Unknown' or
:P1_CONSENT_EXISTS <> 'Y';
I assume I use a "Change" event but I can't work out how to enter the 4 condtions so that they are all checked each time. If I create 4 separate dynamic actions, when I change one of the fields, it does not take into consideration the other field values.
An alternative I've tried is to set up a Read Only condition on P1_TRIAL with the above condition. The only problem is that I have to submit the page each time there is a change in one of the 4 fields above. It would be better if I didn't have to submit the page each time so I'd like to use a Dynamic Action.
thanks in advance
Paul P

Answer 1

Hi Paul.
If you want to evaluate 4 variables in 1 dynamic action you have to post the value of these 4 items on each change of one of these items as far as I know.
I had a form with multiple checks of this kind and ended up having serieus performance issues.
My way around was to evaluate in javascript. You creat a dynamic action on change of any of these 4 fields and set the condition to a javascript expression. The expression looks something like (quick edit so there might be some typos):
$v('P1_TRIAL_STATUS')=='Off-Trial'||
$v('P1_TRIAL_STATUS')=='Unknown')||
$v('P1_DIAGNOSIS_MAJOR')=='UNKNOWN'||
$v('P1_INSTITUTION') =='Unknown'||
$v('P1_CONSENT_EXISTS') == 'Y'
If this evaluates to true the true action of the dynamic action is executed, otherwise the false action.
Cheers
Bas