gregor.js

gregor.js is a JavaScript library for calculations with gregorian dates and display of calendar sheets using DHTML. It can be used to:

• Create a calendar using DHTML
• Create rich form fields for date selection within an HTML page
  (automatic pop-up for date selection)
• Calculate the amount of days between two dates
• Add or substract an amount of days to/from a given date
• Calculate the day of week of a given date
• Calculate the week-number in the year of a given date
  • according to ISO-8601
    (Week starts with Monday, first week contains January 4^th)
  • according to the commonly used system in the USA
    (Week starts with Sunday, first week contains January 1^st)
• Calculate the date of a given year, week-number and day of week

Tested with:

• Mozilla Firefox 3 / 3.5
• Konqueror (KDE 4)
• Safari 4
• Microsoft Internet Explorer 8
• Microsoft Internet Explorer 7
• Microsoft Internet Explorer 6

gregor.js is available under the terms of the MIT-License. Feel free to use it in your own open source project or to incorporate it into a commercial software product.

Download

• gregor.js-v1.0.0.tar.gz

Demonstration

• Example 1:
  Single calendar sheet with navigation and possiblity to select a date
• Example 2:
  Calendar sheet making use of the day_callback function to fill the date cells
• Example 3:
  Rich form fields with pop-up

Documentation

Documentation on how to use the library can be found in the source file gregor.js.

Changes

• 2009-08-18
  • Initial release