PopUp windows and PopUp boxes can be used to show additional information or help text on specific region, buttons, links or words on the page. Move the mouse-cursor over some of the blue, bold words in this text to see it in action.

http://www.mathertel.de/AJAXEngine/S04_VisualEffects/PopUpDemo.aspx

blog: http://ajaxaspects.blogspot.com/


All of the AjaxEngine:
Asynchronous Processing: First series of the samples showing how to handle asynchronous processing on the client and the server.
AJAX core and web service samples: These samples show how to use JavaScript, webservices, AJAX actions and all the features of the AJAX engine.
AJAX web controls: These samples are using web controls and JavaScript behaviors to build up AJAX applications and to reduce the amount of code that has to be written in the pages.
LookUp: A autocomplete web control that suggest input values
TreeView: trees, tree view, hierachical data loading on demand
Field validation: validate field values on the server while filling out the form.
Huge Table: scroll or page through huge tables.
Bible Reader: A more complex AJAX application made of AJAX enabled web controls like cascading select boxes and text retrieval.
Bible Tree View: A AJAX based Tree View using an English Bible.
Page Connections: see how to link AJAX web controls together to reflect changed values.