function ProductHeight() {
    if (document.getElementsByClassName('product-list-item')) {
        var li = document.getElementsByClassName('product-list-item');
        var maxHeight = 0;

        for (var i = 0; i < li.length; i++) {
            var liHeight = li[i].getHeight();

            if (liHeight > maxHeight) {
                maxHeight = liHeight;
            }
        }

        for (var i = 0; i < li.length; i++) {
            li[i].style.height = maxHeight + "px";
        }
    }
}