[JAVASCRIPT] Referencing parent window, from child spawned window

I was wondering how I would go about referencing back to the parent window after I had spawned a child window.

Example

<parent.htm>
open a new window name is "child.htm"

<child.htm>
ok I have finished what I was doing now close and send value back to parent.htm.

So how do I reference parent.htm now?

I thought maybe after I spawn the child.htm I also have a variable parentWindow in child.htm that I set on the next line. this seems a bit messy to me. Isn't there a way to find out where child.htm got spawned from?

Your thoughts.

Use "opener" instead of "parentWindow"

opener.variablename
opener.functionname
opener.document.form.formfield.value

etc.

That's works great.

Thankyou.

Nichoals Orr