how do i use a .gif file instead text for bookmark?

[kkim]

how do i use a .gif file instead text for bookmark?

on module named

Permanent links block v0.1
(Adds a block that displays permanent links such as sitemap, contact, etc.)

/script type="text/javascript"/
writeBookmarkLink('{$come_from}', '{$meta_title|addslashes|addslashes}', '{l s='BOOKMARK' mod='blockpermanentlinks'}');
//script/

I want to remove text 'BOOKMARK' and use a custom .gif file

please help me out

thank you