Problem with Kelvin Luck datepicker [Select Past Dates]

in my project I'm using this datepicker, I read how to put it into Cakephp here: http://bakery.cakephp.org/articles/agusti/2010/02/02/transparent-datepicker-with-jquery

When I change format to ymd (Ex: 2011-12-10), I can´t select past dates l开发者_StackOverflow中文版ike in the example. http://www.kelvinluck.com/assets/jquery/datePicker/v2/demo/datePickerPastDate.html I can't understand how to make past dates selectable.

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I found the answer, just need to edit this line:

this.startDate = null;

to:

this.startDate = '2000-01-01';

And edit this:

this.setStartDate(s.startDate);

to:

this.setStartDate('2000-01-01');