Post-it Note
This is a cross browser "post-it note" script. Use it for special events or news on your site. Easily dismissed, the script also allows you to specify the frequency of its appearance (either once per browser session, or every time the page containing it is loaded).
And last but not least, in IE4/NS6, you can drag the note around.
Example:
 If not showing - Reload page
 
Reminder:

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Visit our Scripts Page for free, cut and paste scripts.

   
   
Follow the editing instructions after the // and within the <!--comment tags-->
to customize the script, then copy and paste it into your HTML editor.