Hi Hari,
If you are writing a web application and are referring to "standard tooltips", then according to HTML standard, you cannot provide styles for the tooltips. Please refer to HTML documentation for details.
If you want to provide style for tooltips, you would need to create your own tooltip box by using HTML/Javascript pop up boxes instead of standard HTML tooltips. There are also a lot of these custom tooltip box implementations in the web. You may try them instead of writing your own. (Eg. try google for "overlib", a common enhanced tooltip implementation).
These custom tooltips may require attach to Javascript mouse events. Please refer to the Javasacript Clickable Chart on an example of how to add Javascript event handlers to the image map.
Hope this can help.
Regards
Peter Kwan |