Hi. I want to auto display a value based on previous version.

1.MainForm

- commodity (option binder - commodity > commodity1) **User will select one option.

- grade (option binder - commodity > commodityGrade) **Automatically display the value based on commodity option.

2. Commodity CRUD (Type of Commodity)

 - commodity1

 - commodityGrade (option binder - grade)

3. Grade CRUD (Type of Grade)

- grade1

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In the main form, I would like the grade select box to automatically display based on the commodity option.

I dont really know how to write Javascript...but this is roughly what I would like to do

<script>

if (commodityGrade == EG) {
grade = "EG";
} else if (commodityGrade == FG) {
grade = "FG";
} else {
grade = "NG";
}
</script>

If someone has a better script or method, please do advise me on the matter.