$(document).ready(function() {
	$("#newsletter_form").validate();
	
	
	var $location_checks = $('input[name=mail_stores[]]')
		$all_checked = $('#mail_stores_all');
	
	$location_checks.change(function () {
		var $this = $(this)
			all_checked = true;
			
		//select all:
		if ($this.attr('value') == 'all') {
			$location_checks.attr('checked', $this.is(':checked'));
		}
		
		$location_checks.each(function () {
			if (! $(this).is(':checked') && $(this).attr('id') != 'mail_stores_all') {
				all_checked = false;
			} 
		});
		
		$all_checked.attr('checked', all_checked);
		
	});
	
});