$.fn.odropdown = function(options) {

    var default_settings = {
        placeholder : 'span',
        placeholder_text : '',
        selected_index : -1
    };

    var settings = $.extend( {}, default_settings, options );
    var selector = $(this).selector;

    return this.each(function() {
        var $this = $(this);
        var $list = $this.find('ul');
        var selected_index = settings.selected_index;
        var $placeholder = $this.find(settings.placeholder);

        if (settings.placeholder_text.length) {
            $placeholder.text(settings.placeholder_text);
        }

        if (settings.selected_index >= 0 && $this.find('li').length >= settings.selected_index) {
            var $li = $this.find('li:eq(' + settings.selected_index + ')');
            selectElementOfList($li);
        } else {
            $this.attr('tabindex', -1);
        }

        // Prepare Form / input selection
        var $input = $('input[name="' + $list.attr('data-target') + '"]');
        var $form = $this.parents('form');

        // Check if the form exist
        if ($form.length) {
            if (!$input.length) {
                $input = $('<input type="hidden" name="' + $list.attr('data-target') + '" value="" />');
                $input.appendTo($form);
            }
        }

        $this.on('click', function(event){
            var is_active = $this.hasClass('active');

            // Delete all active class during to stay focus on the last one
            if ($(selector + '.active').length > 0) {
                $(selector + '.active').removeClass('active');
            }

            if (!is_active) {
                $this.addClass('active');
            }
            event.preventDefault();
            return false;
        });

        $list.find('li').on('click',function(e) {
            selectElementOfList($(this));
            $this.removeClass('active');

            // Have to be called and return false, else parent click will be triggered
            e.preventDefault();
            return false;
        });

        function selectElementOfList($li) {
            selected_index = $li.index();
            $placeholder.text($li.text());
            $this.attr('tabindex', selected_index);

            if ($input) {
                $input.attr('value', $li.attr('data-id'));

                // Trigger some events
                $input.trigger('change');
                $input.trigger('click');
            }
        }
    });
};