See Designer Scripting Basics guide's chapter on Creating and Reusing JavaScript Functions

try again

Here is the form with the script in KPI 1 thru 3

Not sure it saves you a lot but here is an option. 1. create a script object to set the rating fields as required or optional based on 3 parameters:   - the page number   - the object number   - the status of KPI (empty or not)2 include a script in the exit event of each KPI field to test if KPI is ...

would you want to share the form?

what if you re-define sTarget as var sTarget = "object"+i+".kpi"+i;... if(this.resolveNode(sTarget).rawValue == null){ ...

There are exceptions to that I believe: if the script is included in a script object or attached to an object of the master page, I believe the complete SOM would be needed… but I’m not 100% sure. 

And now I realize the rating box fields also change numbers,... so here is a revised scriptfor (var i=1; i<=13;i++){  var sTarget = "object"+i;  var sTargetRatingBox_1 = sTarget+".Table1.Row1.ratingbox"+i+"_1";  var sTargetRatingBox_2 = sTarget+".Table1.Row1.ratingbox"+i+"_2";  var sTargetRatingBox_...

another thought though: since your fields have a default value (0), I think making these field "required" will visually show it, but it won't force the user to change the value of the field.  

I guess you could create a loop running through each object, i.e. from 1 thru 13, create a string variable to specify the targeted object and set the mandatory status using the resolveNode property. Something like:for (var i=1; i<=13;i++){  var sTarget = "object"+i;  if(this.resolveNode(sTarget).kpi...