This datepicker widget uses Prototype and Scriptaculous. It was originally created by Mathieu Jondet (mathieu@eulerian.com) of Eulerian Technologies and includes code by Arturas Slajus for extending the formatting. Mathieu has moved on, but I want to keep developing this. Let me know if you would like to as well. Contact me at tigre@pobox.com

v1.0 now includes customizable and combinable date filters to limit what dates can be selected. There's even an example of using a Google calendar as the data source for a filter.

Key features:

• Customizable and combinable date filters
• Customizable callbacks when selecting a date, or just closing
• Multi-language support:
• English
• French
• Spanish
• Italian
• German
• Portuguese
• Dutch
• Danish
• Hungarian
• Lithuanian
• Latvian
• Polish
• Norwegian
• Swedish
• Finnish
• Romanian
• Chinese
• Japanese
• Customizable date format, and language-specific defaults
• All Scriptaculous effects available for opening and closing the widget

Titi Ala'ilima (http://www.tigretigre.com)