Can't possible onSelect: function(date) change dateformat

[y2kim]

dates:'yyyy-mm-dd', $("#pickdate").val($.datepick.formatDate(date));
like this command but showing error

Uncaught TypeError: date.getMonth is not a functio

like this

[kbwood]

I don't understand where this code fragment is in relation to anything else. Can you provide a page that shows the problem?