Write me a 2.x client side script for Bills, Bill Credits, and Journal Entries that will mark the Amortization Start Date field mandatory when an Amortization Schedule is selected at the line level.

AI generated answer (using internal Slack threads):

****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ****** Based on the conversations, it seems that you can't directly make the Amortization Start Date field mandatory on the form level. However, you can achieve this requirement through SuiteScript. Here is a sample client script that you can use:

javascript
/**
 * @NApiVersion 2.x
 * @NScriptType ClientScript
 */
define(['N/ui/dialog'], function(dialog) {
    function saveRecord(context) {
        var currentRecord = context.currentRecord;
        var lineCount = currentRecord.getLineCount({sublistId: 'item'});
        for (var i = 0; i < lineCount; i++) {
            var amortizationSchedule = currentRecord.getSublistValue({sublistId: 'item', fieldId: 'amortizationschedule', line: i});
            var amortizationStartDate = currentRecord.getSublistValue({sublistId: 'item', fieldId: 'amortizationstartdate', line: i});
            if (amortizationSchedule && !amortizationStartDate) {
                dialog.alert({
                    title: 'Error',
                    message: 'Amortization Start Date is required when an Amortization Schedule is selected.'
                });
                return false;
            }
        }
        return true;
    }
    return {
        saveRecord: saveRecord
    };
});

This script will prevent the record from being saved if an Amortization Schedule is selected but the Amortization Start Date is not filled in. You can deploy this script to your Bills, Bill Credits, and Journal Entries records.