Put nestedSortable in page_edit.js.erb

app/assets/javascripts/page_edit.js.erb

@@ -32,3 +32,24 @@ $('.part_kind').live('click', function() {
 	$('.part_kind_partial').hide();
 	$('#part_' + $(this).attr('value')).show();
 });
+
+$(document).ready(function(){
+	$('ol.sortable').nestedSortable({
+		disableNesting: 'no-nest',
+		forcePlaceholderSize: true,
+		handle: 'i',
+		helper:	'clone',
+		items: 'li',
+		maxLevels: 3,
+		opacity: .5,
+		placeholder: 'placeholder',
+		revert: 250,
+		tabSize: 25,
+		tolerance: 'pointer',
+		toleranceElement: '> div',
+
+		stop: function(event, ui) {
+			$.post("<%= Rails.application.routes.url_helpers.admin_update_position_path %>", { id: ui.item.attr('id'), parent_id: ui.item.parent().closest('li').attr('id'), position: ui.item.index() } );
+  	}
+	});
+});