How to set If/Then Logic for Drop Downs ?

Yes, that's the reason for the button.

With JavaScript you can simply set the value to "Off". If none of the radio button is configured to be "Selected by default", then using a Reset Form action or the resetForm JavaScript will result in none being selected.

For #2 - The names of the fields are as Follows:

Drop Down 1: "Pit Inspected" - Possible answers: YES, NO

If Drop Down 1 is Yes,

Required - Text Box 1: "Time Inspected"

If No, Not Required - Text Box 1.

If Drop Down 1 is Yes,

Required - all of the following 13 Drop Downs must have either Yes or No selected:

Drop Down 2: "Wet Conditions" - Possible answers: YES, NO

Drop Down 3: "Over-head Power" - Possible answers: YES, NO

Drop Down 4: "Utility Crossing" - Possible answers: YES, NO

Drop Down 5: "Adjacent Structure" - Possible answers: YES, NO

Drop Down 6: Cracks in side of pit - Possible answers: YES, NO

Drop Down 7: "Spoils 2' from edge" - Possible answers: YES, NO

Drop Down 8: "Exposed to Vibration" - Possible answers: YES, NO

Drop Down 9: "Surface Water Present" - Possible answers: YES, NO

Drop Down 10: "Vehicular Traffic" - Possible answers: YES, NO

Drop Down 11: "Previously disturbed soil" - Possible answers: YES, NO

Drop Down 12: "Adjacent excavation" - Possible answers: YES, NO

Drop Down 13: "Cracks on top of trench" - Possible answers: YES, NO

Drop Down 14: "Confined space exposure" - Possible answers: YES, NO

If Drop Down 14: "Confined Space Exposure" has answer set to YES

then, Text Box 2 is Required: "If Yes, What Type"

For #1, before setting up any items in the list, set up a custom Validate script for the dropdown that is simply:

// Validate script for dropdown

event.rc = false;

Then add the list items to the dropdown using a script like the following, in the Mouse Up script of a temporary button, for example:

// Array of list items for a dropdown

var aWhiskyList = ["Lagavulin", "Ardbeg", "Laphroaig", "Caol Ila"];

// Populate the dropdown with items in the above array

getField("Whisky").setItems(aWhiskyList);

Then remove the dropdown's Validate script.

At this point, the dropdown value should be blank (zero length string), and it should also include the list items that you set.

A problem with this approach is that it's difficult or impossible (depending on PDF viewer being used) to reset the form to this initial state where no item is selected. This setup is essentially the same as a radio button group with none of the buttons selected. An advantage to using radio buttons is they can easily be reset so that none is selected, but they will generally take up more real estate on a page.

1. You can't do that, unless you tick the option to allow custom user input (but then the users will be able to enter something beside Yes/No...). What you can do is create a default item which is a single space, for example, so it appears as if the field is empty when that item is selected.

2. This can be done using a script. What are the names of these fields?