var scroll_i, scroll_max;
var scroll_speed = 300;

function scroll_next()
{
    if (scroll_i < scroll_max - 1)
    {
        scroll_i++;
        $.scrollTo($('.picture_holder')[scroll_i], scroll_speed, {offset: {left: -230, top: -16}});
    }

    return false;
}

function scroll_prev()
{
    if (scroll_i == 0)
    {
        scroll_i--;
        $.scrollTo($('#text')[0], scroll_speed, {offset: {left: -230, top: -16}});
    }
    else if (scroll_i > 0)
    {
        scroll_i--;
        $.scrollTo($('.picture_holder')[scroll_i], scroll_speed, {offset: {left: -230, top: -16}});
    }

    return false;
}

$(document).ready(function()
{
    scroll_i = -1;
    scroll_max = $('.picture_holder').size();

    $(document).bind('keydown', {combi:'left', disableInInput: true}, scroll_prev);
    $(document).bind('keydown', {combi:'right', disableInInput: true}, scroll_next);
});$