Zalando Ärmelänge - in chrome, add Tampermonkey plugin. add new script. copy paste to new script

zalando.tamper.js

// ==UserScript==
// @name       Zalando Ärmelänge
// @namespace  http://sebslomski.com
// @version    0.1
// @match      http://www.zalando.de/*
// @copyright  2014+, Seb
// ==/UserScript==

var $productList = $('.productsGridList.catalog');

if ($productList.length) {
    var $filter = $('#multiFilter ul');

    var from = localStorage.getItem('sleeve_size_from');
    var to = localStorage.getItem('sleeve_size_to');

    if (!from) {
        from = prompt('Ärmelänge von');
        to = prompt('Ärmelänge bis');
        
        localStorage.setItem('sleeve_size_from', from);
        localStorage.setItem('sleeve_size_to', to);
    }

    var $filterItem = $('<li id="sleeveSizeFilter" class="filtBut"><a href="#" title="Ärmelänge"><span class="value">' + from + ' - ' + to + ' cm</span><span class="icon">×</span></a></li>');
    $filter.append($filterItem);
    
    $filterItem.click(function() {
        $('#sleeveSizeFilter').remove();
        localStorage.removeItem('sleeve_size_from');
        localStorage.removeItem('sleeve_size_to');
    });
    
    
    
    $productList.children().each(function() {
        var $this = $(this);
        var productLink = $this.find('.productBox').attr('href');
        $.get('http://www.zalando.de' + productLink).done(function(res) {
            var $body = $(res);
            var $sleeve = $body.find('.sleeve_length');
            var text = 'Ärmelänge nicht angegeben';
            
            if ($sleeve) {
                try {
                    text = $sleeve.html().split(':')[1];
                    
                    var size = Number(text.trim().split(' ')[0]);
                    
                    if (size >= from && size <= to) {
                        $this.css({
                            background: 'rgba(255, 0, 0, 0.2)'
                        });
                    }
                } catch (e) {
                    text = 'Ärmelänge nicht angegeben';
                }
            }
            
            $this.find('.priceBox').append('<br><b>' + text + '</b>');
        });
    });
}