Add popup - open a new add popup page after saving

Hi,
using 5.3 7474 version I am trying to add the following functionality from my clients request:

using add popup page, when a user adds new records he can either

• save and close popup window
  
• or save and continue adding records when clicking "Save and add new" button.
  Here is what I have done so far after some searching:
  1.New button to a add page:
  <INPUT id=submit2 value="Save and Add new" type=button name=submit2>
  2.Javascript onload event for a add page:
  $("#submit2").bind("click", {page: this}, function(e){
  var page = e.data.page;
  page.on('beforeSave', function(formObj, fieldControlsArr, pageObj){
  
  formObj.baseParams['submit2'] = 'Save and Add new';
  
  }, page, { single: true});
  
  page.on('afterSave', function(respObj, formObj, fieldControlsArr, pageObj){
  
  delete formObj.baseParams['submit2'];
  
  }, page, {single: true});
  page.saveHn(e);
  
  $("#addButton"+1).click(); // opens a new add popup page, 1 is a pageid for a list page
  }
  );
  This approach seems to work in simple add popup pages but not if there is also child records from a detail table included. These child records are not saved and also a new add popup page is not opened.
  So, I wonder if somebody can help and give some examples how to proceed.
  Regards
  
  Jouni I