Trying to get inDesign javascript to make text field nonprinting

Question

This seems like it should be very simple, but of course it's blowing up on me.

I'm working with Adobe InDesign CS3 on a form and when certain conditions are met I have a text frame that I've labelled in the script label panel as "RUSH" (no quotes in label panel). that I want to make nonprinting. So far it looks like this:

document.textFrames.item("RUSH").nonprinting = false;

and yet whenever I execute that script I get the error 45 "object not valid"

I'm new to inDesign scripting and I've been searching all day for an example or answer but so far nothing. Any thoughts? Did I do or miss something super dumb?

UPDATE: to summarize the below answer, what I was missing was .itemByName

The code now functions as intended with the following line:

document.textFrames.itemByName("RUSH").nonprinting = false;

With the frame tagged in the Scripts Label panel.

Thanks to everyone for your help!

Answer 1

So in this thread on the Adobe forum, a poster says: "Use the Script Label panel in CS4 and below, but the Layers panel in CS5 and above."

On CS6, I can get the text frame to be nonprinting by naming it "RUSH" in the Layers Panel, and running this code:

var rush = doc.textFrames.itemByName("RUSH");
rush.nonprinting = false;