- Display the contents of external files in the tooltip.
- Pass one or more data values to the server for use in a query or lookup.
- Return discrete data items from the server (e.g., image, text, and caption) for use with one of the formatting functions.
- Combine Ajax with other features of the code, such as alternate classes, or hoverable or positioning options.
- Include some "static" tooltips in the page while others are retrieved using Ajax.