Add a init-time event to allow for configuring options as jquery mobile does.

[vaab]

This is a simple event that is triggered when datebox finished to init.

This permits configuration à la jquery. (cf: http:https://jquerymobile.com/test/docs/api/globalconfig.html)

Sample config code:

$(document).bind("dateboxinit", function(){
  $.extend($.mobile.datebox.prototype.options, {
    'dateFormat': 'YYYY-mm-dd',
    'headerFormat': 'YYYY-mm-dd',
    'noButtonFocusMode': true
   });
  });

[jtsage]

I decided to do this a little differently. Your init hook was sort of in the wrong place, now, 'dateboxbeforecreate' fires after 'pagecreate' when DateBox is loaded. 'dateboxcreate' fires as DateBox is initializing (before it actually does). And 'dateboxaftercreate' fires when the init is done. Fwiw, what you show here you can actually put in a $(document).bind('pagecreate') instead, it should work just fine there - it also will let you customize some of the one-time details (field order, etc) that this would be too late for.