How can I submit data to a form from a pop-up window?

In the pop up window, you can trigger the form in the parent / opener window to submit using this syntax:

window.opener.document.{form name}.submit();

where {form name} is the name of the form in the <form> tag on the opening page.

If you just want the parent window to reload, you can do this:

window.opener.location.reload();

This works on IE and Firefox, perhaps others as well.