Once you have created the editElectronic.jsp file, add the following JS call to a new custom JS file:

custom.commerce.csr.order.shipping.editShippingAddress = function(pURL){
  atg.commerce.csr.common.submitPopup(pURL,
      dojo.byId("mycsrEditShippingAddressForm"),
      dijit.byId("mycsrEditAddressFloatingPane"));
};

This function submits a pop up page form.