Round World Clock
You can see what the Java Script produces at the top left of the page and on the bottom of the page (in the statusbar).
Drop down world time can be removed, also 12 or 24 hour format.

Example:
  
Look at the bottom of the
page (in the statusbar).

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