$(document).ready(function () {
    //navigation
    $('#navigation').superfish();

    $('.side_list li img.lev1').click(function () {
        var $this = $(this);
        var $currentSubcategories = $this.parent().find('>ul');

        $('.side_list li ul').slideUp();

        if ($currentSubcategories.is(':visible') == false) {
            $this.attr('src', '/images/side_ico2.gif');
            $currentSubcategories.slideDown();
        }
        else {
            $this.attr('src', '/images/side_ico1.gif');
        }
        return false;
    });

});