Webdev - datepicker GUI recommendations/inspiration

As a user, I generally don't like working with calendar GUI (e.g. on airline booking pages). Too often, they feel clunky, difficult, and unfriendly.

I'm coding a calendar now (again) and I'm looking for inspiration and great examples. Does the SO community have any recommendations?

(I'm looking mainly for user friend开发者_StackOverflow社区liness and ease of use, rather than slick graphics.)

Update

I really like this calendar: http://book.harbour-plaza.com/en/reservations_check.asp?Hotel_id=hpme - user friendly and slick graphics!

I like the JQuery UI DatePicker, very customisable for functionality and a choice of themes if you don't want to create your own.

http://jqueryui.com/demos/datepicker/

Depends what type of calendar exactly. There are two I like, one weekly and another monthly.

Weekly

Monthly

Both are jQuery.

ExtJS includes a calendar example in it's latest incarnation (well, from 3.x onwards), check out the Samples & demos page to see it in action.

For a full-blown calendar based on ExtJS check out http://ext-calendar.com/. You can switch between different views (daily, weekly, monthly) and create your own. There still are a few bugs to iron out though... (ie. if you select a 2 weeks calendar view and display less then 7 days, the calendar will not render correctly).