Accessing Main Window

I have a HTML page (let's call this main window Window A) that has an object embedded(using IE 3.022 and above) and a link that when clicked, will use javascript to open/create a small new window (let's call it Window B).

In Window B, there are also links that when clicked, will need to trigger some events of the object embedded in Window A. I used something like this in Window B :

<a href="javascript:????.myObject.myObjectFunc(1)">Do something</a>

So what should I put in ???? to access the function of the object in Window A?

Thanks for helping!