[javascript] Javascript date.getYear() returns 111 in 2011?

I have this javascript for automatically setting a date filter to the first and last day of the previous month:

$(document).ready(function () {
    $("#DateFrom").datepicker({ dateFormat: 'dd/mm/yy' });
    $("#DateTo").datepicker({ dateFormat: 'dd/mm/yy' });

    var now = new Date();
    var firstDayPrevMonth = new Date(now.getYear(), now.getMonth() - 1, 1);
    var firstDayThisMonth = new Date(now.getYear(), now.getMonth(), 1);
    var lastDayPrevMonth = new Date(firstDayThisMonth - 1);

    $("#DateFrom").datepicker("setDate", firstDayPrevMonth);
    $("#DateTo").datepicker("setDate", lastDayPrevMonth);
}); 

BUT now.getYear() is returning 111 instead of the expected 2011. Is there something obvious I've missed?

In order to comply with boneheaded precedent, getYear() returns the number of years since 1900.

Instead, you should call getFullYear(), which returns the actual year.

From what I've read on Mozilla's JS pages, getYear is deprecated. As pointed out many times, getFullYear() is the way to go. If you're really wanting to use getYear() add 1900 to it.

var now = new Date(),
    year = now.getYear() + 1900;