Couple of things:

Your if statements aren't correct - you need two equal signs to test a value not one. So, if (noCheckBox.rawValue = 0) should be if (noCheckBox.rawValue == 0)

In File>Form Properties on the Defaults tab make sure that "Preserve scripting changes..." is set to Automatically.

You shouldn't need it on the Initialize event, the Change event should be fine.

Can you post your script?

That should work. You're missing semicolons after each statement and I thought that might be tripping it up but it worked fine when I tested it, every statement in JavaScript should end with a semicolon but if there is just one line I guess it works ok (see below).

if (litstudiesckkbox.rawValue==1) {

     subform1.presence = "visible";

}

else {

     subform1.presence = "hidden";

}

When you are in Acrobat press CTRL-J and the JavaScript console should open. Then click the checkbox and see if any error messages appear in the console window.

If that doesn't show anything if you can share your form via acrobat.com (or some other file sharing site) then I can take a look. If you use acrobat.com then once you have uploaded the file you need to select it and Share it and then Publish it, then you can paste the link here.

The problem is that it isn't a checkbox, it's a radio button - radio buttons are meant to be used in an "exclusion group" which means you can only select one of one or more options and you can't uncheck them without scripting. You'll see in the hierarchy that your button is grouped under an object called "RadioButtonList".

To change it to a checkbox click on your litstudiesckkbox (in the hierarchy palette) and then on the Object palette on the Field tab change the Type from Radio Button to Check Box.

The other checkbox you have to the right is set up correctly as a checkbox.

The script on the Initialize event looks ok as it's being used to set the initial visibility of the subform.

Yes, the checkbox on the right worked fine for me. And the left one did once I switched it to being a checkbox.

Not sure what the problem would be. What version of Acrobat or Reader are you using to test?

Here's the version I tested.

https://acrobat.com/#d=Jv9*SVKwJSGxnElnWdXitg

I'm running 9.5. Not sure why it wouldn't be working in 10. I have version 10 at home so I'll take a look tonight if I can.

The target version is for the minimum version you want the form to be able to work with.

So I'm not sure what, but there's something weird going on in your form.

I tried several variations of scripts and something always didn't work quite right. I also tried doing it in FormCalc instead of JavaScript and got similar results.

If I create a new form with a checkbox and a subform and show and hide the subform from the checkbox it works fine in Acrobat 10. With your form I got it almost working but it would only work around twice and then just stop working.

So there may be some sort of corruption in the form. There's also a lot of calculation scripts going on so perhaps something is getting in the way there, I'm just not sure.