woocommerce/assets/js/frontend/cart.min.js

jQuery(document).ready(function(e){e(".shipping-calculator-form").hide();e(".shipping-calculator-button").click(function(){e(".shipping-calculator-form").slideToggle("slow");return!1});e("select#shipping_method, input[name=shipping_method]").live("change",function(){var t=e(this).val();e("div.cart_totals").block({message:null,overlayCSS:{background:"#fff url("+woocommerce_params.ajax_loader_url+") no-repeat center",opacity:.6}});var n={action:"woocommerce_update_shipping_method",security:woocommerce_params.update_shipping_method_nonce,shipping_method:t};e.post(woocommerce_params.ajax_url,n,function(t){e("div.cart_totals").replaceWith(t);e("body").trigger("updated_shipping_method")})})});