Sprigst Javascript Calendar
EditByBSEditor: Sprigst Calendar is very widely used free JavaScript Calendar Control that makes it easy for your Visitors to fill out the date fields by selecting the date from a calendar. Our JavaScript Calendar is the best solution for website development. Sprigst Calendar is a verified, extremely fast, small cross-browser JavaScript control.

Featureset
Unlimited number of calendars on one page
A date can be changed by months and years as well
Easy to set up
Easy skin change
Highly optimized code
Any delimiters can be used in a date format
Any date format can be built up of mm, dd and yyyy parts.
Localization supported you can free download Sprigst Calendar 1.0 now.