Call main page function from iFrame?

Question

Yes, I have seen this question, but I am still finding myself confused: How to Call JavaScript From Main Window

I want to call a function that toggles an object with jQuery on the parent frame from an iframe. How exactly would something be done?

window.parent.[...?]

Answer 1

In main window:

function toggleMe() {
    $('#myid').toggle();
}

In child frame:

window.parent.toggleMe();