var num_images_scroll_per_page = 3;
var other_image_list = new Array();
var other_image_scroll_selected = 0;

function init_scrolls_others_images() {

    $('#arrow-top-op').unbind('click');
    $('#arrow-top-op').click(function() {
        scroll_left_others_images();
    });

    $('#arrow-bottom-op').unbind('click');
    $('#arrow-bottom-op').click(function() {
        scroll_right_others_images();
    });
}

/*
 *  PRODUCTS
 */

function init_others_images_scroll() {

    $('#others-images-product').scrollTo( 0, 800, {queue:true} );

    var first_index_value = other_image_list[0];
    $.aux = $('#' + first_index_value);
//    $('#products').scrollTo( $.aux, 800, {queue:true} );

    other_image_scroll_selected = 0;

    // DISABLE ARROW LEFT
    $('#arrow-top-op').removeClass('arrow-top');
    $('#arrow-top-op').addClass('arrow-top-disabled');

    // TEST ARROW RIGHT
    if ( num_images_scroll_per_page > (other_image_list.length - 1) ) {
        // DISABLE ARROW RIGHT
        $('#arrow-bottom-op').removeClass('arrow-bottom');
        $('#arrow-bottom-op').addClass('arrow-bottom-disabled');
    }
    else {
        // ENABLE ARROW RIGHT
        $('#arrow-bottom-op').removeClass('arrow-bottom-disabled');
        $('#arrow-bottom-op').addClass('arrow-bottom');
    }
}

function clean_others_images_scroll() {
    $('#arrow-top-op').removeClass('arrow-top');
    $('#arrow-top-op').addClass('arrow-top-disabled');

    $('#arrow-bottom-op').removeClass('arrow-bottom');
    $('#arrow-bottom-op').addClass('arrow-bottom-disabled');
}

function scroll_right_others_images() {

    if ( (other_image_scroll_selected + num_images_scroll_per_page) > (other_image_list.length - 1) ) {
        // NO SCROLL (last page)
    }
    else {
        var next_index = other_image_scroll_selected + num_images_scroll_per_page;
        var next_index_value = other_image_list[next_index];

        $.aux = $('#' + next_index_value);

        $('#others-images-product').scrollTo( $.aux, 800, {queue:true} );
        other_image_scroll_selected += num_images_scroll_per_page;
    }

    /* TEST NEXT PAGE TO ENABLE/DISABLE ARROWS */

    if ( (other_image_scroll_selected + num_images_scroll_per_page) > (other_image_list.length - 1) ) {
        // DISABLE ARROW RIGHT
        $('#arrow-bottom-op').removeClass('arrow-bottom');
        $('#arrow-bottom-op').addClass('arrow-bottom-disabled');
    }
    if ( other_image_scroll_selected > 0 ) {
        // ENABLE ARROW LEFT
        $('#arrow-top-op').removeClass('arrow-top-disabled');
        $('#arrow-top-op').addClass('arrow-top');
    }
}

function scroll_left_others_images() {

    if ( (other_image_scroll_selected - num_images_scroll_per_page) < 0 ) {
        // NO SCROLL (first page)
    }
    else {
        var next_index = other_image_scroll_selected - num_images_scroll_per_page;
        var next_index_value = other_image_list[next_index];

        $.aux = $('#' + next_index_value);

        $('#others-images-product').scrollTo( $.aux, 800, {queue:true} );
        other_image_scroll_selected -= num_images_scroll_per_page;
    }

    /* TEST NEXT PAGE TO ENABLE/DISABLE ARROWS */

    if ( other_image_scroll_selected == 0 ) {
        // DISABLE ARROW LEFT
        $('#arrow-top-op').removeClass('arrow-top');
        $('#arrow-top-op').addClass('arrow-top-disabled');
    }
    if ( (other_image_scroll_selected + num_images_scroll_per_page) <= (other_image_list.length - 1) ) {
        // ENABLE ARROW RIGHT
        $('#arrow-bottom-op').removeClass('arrow-bottom-disabled');
        $('#arrow-bottom-op').addClass('arrow-bottom');
    }
}