Use a checkbox to hide/show (toggle) another field

Question

I have a form I am creating in Adobe Acrobat X.  The form will ultimately be used as a data entry interface on iPads.  I need to keep the form very simple but there is a lot of technical information the end users may need to help fill out the forms.  I would like to be able to have a button, checkbox or other object enable the user to display additional information.
I have played with making links to attached documents, using the article tool and finally trying to use a checkbox to drive the hidden/visible property of a text field.  Admittedly, I am a horrific programmer so I need some spoon fed help. 
My check box is called: GMR1_1_Details_Select
The text field is called: GMR1_1_Details
I have been trying this and that with JavaScript in both the Actions tab and Calculate tab and am unsuccessful.
Can anyone solve this puzzle for me?  I want to code this into my form:
// so when the check box named "GMR1_1_Details_Select" is checked, my text box field ("GMR1_1_Details") is visible.  If the user unchecks the box, it would be hidden.  By default, the text box should be hidden and the checkbox shouldbe unchecked.
If GMR1_1_Details_Select = yes
Then GMR1_1_Details = visible
else
GMR1_1_Details = hidden
I have tried codes similar to:
if (event.target.value!="On") This.getfield(“GMR1_1_Details”).display = display.hidden;
and other code similar to:
Var GMR1_1 = this.getField(“GMR1_1_Details”);
If(GMR1_1==="yes");
This.getfield(“text10”).display = display.hidden;
else
This.getfield(“text10”).display = display.visible;
In both cases I am getting nothing.  I have realized that I have at least 2 problems:
1) I don't know how to write the right code and,
2) I don't know where to put it.
Please and thank you

Answer 1

Yes, here is a link to the documentation: http://livedocs.adobe.com/acrobat_sdk/9.1/Acrobat9_1_HTMLHelp/JS_API_AcroJS.88.135.html
There are a number of examples that demonstrate various options. You can add a title, but to make the JavaScript warning go away the document would have to be certified and the user would have to trust it to execute JavaScript, or each user would have to install a JavaScript file in a particular location on their system. If this might be feasible for your situation, post again for more details.
If you want to get really fancy, it's possible to create custom dialogs that include things like images as well as text, and you have more control over the layout. This is one of the more complicated things in Acrobat JavaScript though, so you have to really want it if you plan on learning more.