IDCS6 Mac Interactive Button creation with URL

Question

I have been requested to write a series of scripts that will automate the building of interactive objects such as buttons that will then activate a web page or an email address.  I looked at the object model and the Button object has a property called gotoURLBehaviors which, if one looks at it on a button that is already created, contains the web address of whatever web page the button is pointed to.  The button works.
However, if I attempt to write to this list using the add method ESTK tells me that this property is readonly.
Using Javascript, how can I get my URL associated with the button I am creating?

Answer 1

Well, now, that's just the thing, Hans.  In the scripting guide, using "bounds" as an example, I may instantiate an object like this:
var MyObject = new somethingOrTheOther(10,10,20,20);
or I may do it like this:
var MyObject = new somethingOrTheOther([10,10,20,20]);
or I may do it like this:
var MyObject = new somethingOrTheOther({bounds = (10,10,20,20)});
Though your help was immensely appreciated, I searched for two hours on my own looking for a syntax that would work.  Did you discover it by trial and error, or is it stated someplace else where I can look and find other important, if hidden bits of information?
I am also curious to know why the documentation calls that property "readonly" when in reality it is quite manipulable if you use the right syntax?
TIA!
R,
John