How to Write javascript running on the child page (PopUp.aspx) to update the value of a label on the parent page.

Question

any references document

Answer 1

Here's how:

http://www.webreference.com/js/tutorial1/opener.html

You'll have full access to any javascript methods in the parent opener simply by using

window.opener.myFunction(params);

Clarity EDIT:

window.opener.document.getElementById('myLabel').value = 'some text';