How to auto fill image link from own-created imagebrowser

Hi,
I'm creating own imagebrowser. I need that when I select some image in imagebrowser and click on "OK", in the "Image Properties" window is automatic fill in URL of image (thumbnail) and image link (enhanced image). This informations is declared in my imagebrowser script.

To fill in URL of image i use script

<script type="text/javascript">
function SelectFile( fileUrl )
{
        window.opener.SetUrl( fileUrl ) ;
        window.close() ;
}
</script>

<a href="javascript:SelectFile('File1.jpg');">File 1</a><br />

However, I don't know how to fill in image link. I tried many possibilities, but unsuccessfully.
Could you help me, please ?

Best regards,
Peter.

PS: Sorry for my English