var compare_products_array = new Array();

function check_for_compare (o, pr_id) {
    if ( o.checked ) {
        var selected_products = document.cookie.match(/m_shop_catalog_compare_product/g);
//        if ( selected_products && selected_products.length >= m_shop_catalog_compare_count ) {
        if ( compare_products_array.length >= m_shop_catalog_compare_count ) {
            alert(m_shop_catalog_compare_count_msg);
            o.checked = false;
        }
        else {
            addCompareProduct(pr_id);
        }
    }
    else {
        delCompareProduct(pr_id);
    }
//    alert('Jus turite pazymetu produktu: '+compare_products_array.length);
}

function addCompareProduct(pr_id) {
    compare_products_array[compare_products_array.length] = pr_id;
    setCookie('m_shop_catalog_compare_product['+pr_id+']', 1);
}

function delCompareProduct(pr_id) {
    var tmp = compare_products_array;
    compare_products_array = new Array();
    for ( var i in tmp ) {
        if ( tmp[i] != pr_id ) {
            compare_products_array[compare_products_array.length] = tmp[i];
        }
    }
    deleteCookie('m_shop_catalog_compare_product['+pr_id+']');
}

function compareSelectedProducts() {
    if ( compare_products_array ) {
        if ( compare_products_array.length > 0 ) {
//            alert(compare_products_array);
            window.location = m_shop_compare_url+compare_products_array.join(',');
        }
        else {
            alert(m_shop_catalog_compare_no_items_msg);
        }
    }
    else {
        compare_products_array = new Array();
    }
}