Javascript pass a value from a popup window into a form field of the opener page

here is the poroblem

I want to pass a value from a popup window into a form field of the opener
page.

I have one form on a page. I click the button that opens a browser window.
Here I upload the image. When the image is uploaded I have something like
<CFSET thefilename = file.ServerFile>
<CFOUTPUT>
<SCRIPT language=javascript>window.opener.SetImageName('#t hefilename#') ;
window.close();</SCRIPT>
</CFOUTPUT>


Now the problem is this SetImage function:

It should write the name of the newly uploaded image into the

<INPUT name="image1" value="#SomeDatabaseValue">

Provided that it replaces the "SomeDatabaseValue" with the new value.

Thanks