ages = {}
      if (sessionStorage.getItem("catalog_images") != null) {
        catalog_images = JSON.parse(sessionStorage.getItem('catalog_images'))
        if (Object.keys(catalog_images).length > 0) {
          $("#operatingSystemVariant").empty();
          os = $("#operatingSystem option:selected").text();
          for (let i = 0; i < catalog_images[os]['variants'].length; i++) {
            if (catalog_images[os]['variants'][i] == 'default') {
              $('#operatingSystemVariant').append('<optio