This solution can be used "as-is", without any changes if
a. It is used in a Submission Form DataPage and
b. The fields Position1, Position2, and AllPositions exist in your table and the form.
c. The form is the only one Caspio DataPage deployed on your web page.
To use this solution copy and paste the code below, inside the HTML Footer section of the Submission Form using the Caspio Bridge DataPage Wizard.
var position1 = document.getElementById("InsertRecordPosition1").value;
var position2 = document.getElementById("InsertRecordPosition2").value;
var allpositions = position1 + position2;
document.getElementById("InsertRecordAllPositions").value = allpositions;
Tips for Customization
To customize this script to be used on an Update Form or a Details page of a Search and Report DataPage, replace the prefix "InsertRecord" with "EditRecord" in the code.
# MS Windows - IE 8.0, Firefox 3.6.3, Chrome 4.1.249, Safari 4.0.3
# Macintosh - Firefox 3.5.7, Safari 4.0.3