I was in fact hoping that there may be a better way than my suggestion. However, for those who wish to ponder this because it is a good example, I would mention the calendar callback is extremely useful for...
* changing dates in other related date fields e.g. choosing a date range. * firing some other scripts or urls. Inclusion as I've suggested does two things... 1. Highlights the existence of the useful function. 2. Demonstrates how to use it in your form code. I believe we should include the most useful functions of widgets etc so that they are easily accessible for new developers who otherwise spend hours looking for stuff. Thanks. -D
