var slider_disabled = false;
var slider_item_width = 165;
function slider_scroll(object, direction) {
    if (slider_disabled)
        return;
    var slider_object_id = $(object).parent().parent().parent().attr('id');
    var number_of_items = $('#' + slider_object_id + ' .items ul li').length;
    if (direction == -1 && $('#' + slider_object_id + ' .items ul').position().left >= 0)
        return;
    if (direction == 1 && $('#' + slider_object_id + ' .items ul').position().left <= - slider_item_width * (number_of_items - 4.5))
        return;
    slider_disabled = true;
    $('#' + slider_object_id + ' .items ul').animate({
        left: '-=' + direction * slider_item_width
    }, 500, function() {
        slider_disabled = false;
        slider_check(slider_object_id);
    });
}
function slider_check(slider_object_id) {
    var number_of_items = $('#' + slider_object_id + ' .items ul li').length;
    if ($('#' + slider_object_id + ' .items ul').position().left >= 0)
        $('#' + slider_object_id + ' .arrow_left .button').addClass('disabled');
    else
        $('#' + slider_object_id + ' .arrow_left .button').removeClass('disabled');
        
    if ($('#' + slider_object_id + ' .items ul').position().left <= - slider_item_width * (number_of_items - 4.5))
        $('#' + slider_object_id + ' .arrow_right .button').addClass('disabled');
    else
        $('#' + slider_object_id + ' .arrow_right .button').removeClass('disabled');
}