Jquery datetime picker plugin?

I am using this plugin:

http://tedserbinski.com/jcalendar/index.html

The plugin is supposed to accept a user defined startdate, but I cant manage to get it to work.

This is the header of the js file:

var _drawCalendar = function(dateIn, a, day, month, year) {

  var today = new Date();


    if (dateIn == undefined) {
        // start from this month.
        d = new Date(today.getFullYear(), t开发者_StackOverflow中文版oday.getMonth(), 1);
        year.val(today.getFullYear());
        month.val(today.getMonth()+1);
        day.val(today.getDate());

    }
    else {
        // start from the passed in date
        d = dateIn;
      d.setDate(1);
    }

And i am calling the calendar plug with the following line, that actually is missing something. I have tried hundreds of diffrent code snippets, but I have gived up :(

$('fieldset.jcalendar').jcalendar();

Best regards, Joakim

Any particular reason you aren't using the DatePicker that comes with jQuery UI? The page you linked even says that the project has been superceded by jQuery UI.