Hi all, im having real trouble returning a value from a popup window. Has any1 got a simple example that I could have a look at? ive tried the following, but with no luck Parent page- code included into the page_load: AddressFiller.Attributes.Add("onclick", "window.open('AddressFiller.aspx',null,'left=400, top=100, height=250, width= 250, status=n o, resizable= no, scrollbars= no, toolbar= no,location= no, menubar= no');"); Code (markup): AddressFiller.aspx Close.Attributes.Add("onclick", "return window.opener.TextBox1.value='something';"); Code (markup): The coding is done is ASP.NET. The above code is specifying the javascript code that should be execuuted on a button click. Any ideas why 'something' is not being outputted into TextBox1 on the parent window?