AJAX doesn't work in jQuery 1.9+

We manually change the date of the hidden views exposed filter that makes AJAX functionality work. To do this, the date field is updated like this:

$cal.find('#edit-' + fields[i] + '-' + type + '-year').attr('value', date_parts[type][0]);

But to be compatible with jQuery 1.9+, we need this instead:

$cal.find('#edit-' + fields[i] + '-' + type + '-year').val(date_parts[type][0]);

There could be other stuff that doesn't work in 1.9, but I didn't come across anything.