public function add_category_fields() {
		?>
		<div class="form-field term-display-type-wrap">
			<label for="display_type"><?php esc_html_e( 'Display type', 'woocommerce' ); ?></label>
			<select id="display_type" name="display_type" class="postform">
				<option value=""><?php esc_html_e( 'Default', 'woocommerce' ); ?></option>
				<option value="products"><?php esc_html_e( 'Products', 'woocommerce' ); ?></option>
				<option value="subcategories"><?php esc_html_e( 'Subcategories', 'woocommerce' ); ?></option>
				<option value="both"><?php esc_html_e( 'Both', 'woocommerce' ); ?></option>
			</select>
		</div>
		<div class="form-field term-thumbnail-wrap">
			<label><?php esc_html_e( 'Thumbnail', 'woocommerce' ); ?></label>
			<div id="product_cat_thumbnail" style="float: left; margin-right: 10px;"><img src="<?php echo esc_url( wc_placeholder_img_src() ); ?>" width="60px" height="60px" /></div>
			<div style="line-height: 60px;">
				<input type="hidden" id="product_cat_thumbnail_id" name="product_cat_thumbnail_id" />
				<button type="button" class="upload_image_button button"><?php esc_html_e( 'Upload/Add image', 'woocommerce' ); ?></button>
				<button type="button" class="remove_image_button button"><?php esc_html_e( 'Remove image', 'woocommerce' ); ?></button>
			</div>
			<script type="text/javascript">

				// Only show the "remove image" button when needed
				if ( ! jQuery( '#product_cat_thumbnail_id' ).val() ) {
					jQuery( '.remove_image_button' ).hide();
				}

				// Uploading files
				var file_frame;

				jQuery( document ).on( 'click', '.upload_image_button', function( event ) {

					event.preventDefault();

					// If the media frame already exists, reopen it.
					if ( file_frame ) {
						file_frame.open();
						return;
					}

					// Create the media frame.
					file_frame = wp.media.frames.downloadable_file = wp.media({
						title: '<?php esc_html_e( 'Choose an image', 'woocommerce' ); ?>',
						button: {
							text: '<?php esc_html_e( 'Use image', 'woocommerce' ); ?>'
						},
						multiple: false
					});

					// When an image is selected, run a callback.
					file_frame.on( 'select', function() {
						var attachment           = file_frame.state().get( 'selection' ).first().toJSON();
						var attachment_thumbnail = attachment.sizes.thumbnail || attachment.sizes.full;

						jQuery( '#product_cat_thumbnail_id' ).val( attachment.id );
						jQuery( '#product_cat_thumbnail' ).find( 'img' ).attr( 'src', attachment_thumbnail.url );
						jQuery( '.remove_image_button' ).show();
					});

					// Finally, open the modal.
					file_frame.open();
				});

				jQuery( document ).on( 'click', '.remove_image_button', function() {
					jQuery( '#product_cat_thumbnail' ).find( 'img' ).attr( 'src', '<?php echo esc_js( wc_placeholder_img_src() ); ?>' );
					jQuery( '#product_cat_thumbnail_id' ).val( '' );
					jQuery( '.remove_image_button' ).hide();
					return false;
				});

				jQuery( document ).ajaxComplete( function( event, request, options ) {
					if ( request && 4 === request.readyState && 200 === request.status
						&& options.data && 0 <= options.data.indexOf( 'action=add-tag' ) ) {

						var res = wpAjax.parseAjaxResponse( request.responseXML, 'ajax-response' );
						if ( ! res || res.errors ) {
							return;
						}
						// Clear Thumbnail fields on submit
						jQuery( '#product_cat_thumbnail' ).find( 'img' ).attr( 'src', '<?php echo esc_js( wc_placeholder_img_src() ); ?>' );
						jQuery( '#product_cat_thumbnail_id' ).val( '' );
						jQuery( '.remove_image_button' ).hide();
						// Clear Display type field on submit
						jQuery( '#display_type' ).val( '' );
						return;
					}
				} );

			</script>
			<div class="clear"></div>
		</div>
		<?php
	}