Make jscalendar settings, e.g, timeFormat, configurable

Good questions!

I think what we need to do is:

* Add attributes to the $form with the desired settings, e.g., $form['#jscalendar_showsTime'] = 'true';
* Add an optional 'locale' or language argument to jscalendar_load(), defaulting based on the Drupal locale.
* Use form_alter to add hidden form fields to the form, passing these settings to the browser, and using defaults based on the drupal config, e.g., time format.
* In the Javascript, read in the form's hidden inputs and set the Calendar.setup accordingly.

var form = input.form;
Calendar.setup(
  {
    ifFormat: form.ifFormat.value;
  }
);

The calendar width bug is now fixed. Do a fresh download (it might need to be repackaged).

I'll get to this when I get a chance. Feedback on the approach meantime would be great.

Thanks KarenS, committed an interim change making your suggestions the defaults.

Most or all of the discussed changes are now implemented. We now don't have to invoke jscalendar_load--it's done automatically as needed. Please test and, if it's working well, set this issue to fixed.

Here's instructions from the README:

Adding to a textfield
----------------------

To include a jscalendar popup with a textfield, just add the class 'jscalendar':

  $form['date'] = array(
    '#type' => 'textfield',
    '#attributes' => array('class' => 'jscalendar')
  );

Customization
----------------------

To change the default display and functionality of the calendar, set startup parameters by adding selectors to your form. The three configurable options are 'ifFormat' (the format of the date/time written to the text field), 'showsTime' (boolean: should time be displayed on the calendar), and 'timeFormat' (values of '12' for 12-hour clock, which is the default, or '24' for 24-hour clock).

Examples:

  // Use only year, month, and day in textfield.
  $form['#jscalendar_ifFormat'] = '%Y-%m-%d';
  // Don't show time.
  $form['#jscalendar_showsTime'] = 'false';
  // Show 24-hour clock.
  $form['#jscalendar_timeFormat'] = '24';

Localization
----------------------

Jscalendar comes with numerous localization files, see the /lib/lang directory. By default, the module will look at the current Drupal $locale and load an appropriate localization file, defaulting to 'en' for unsupported languages. To explicitly set the localization file to be used, call jscalendar_load() with your desired localization as the argument. Example:

jscalendar_load('it');