Step 1: Please go to Administrator → Component → VM manager → One page checkout

Step 2: Setting Visual layouts and setting general

How to setting Backend and Frontend in One page checkout for Virtuemart? 

Step 2: Click tab settings

  • Load CSS : Activate to load CSS of One Page Checkout frontend (Advised to activate)
  • Load Jquery : Enable to load Jquery (v1.11.2) for frontend (Do not triggered if your site already has jQuery)
  • Load Jquery UI : Loading Jquery UI (v1.9.2) for frontend(Not activate if your site already has jQuery UI)
  • Load ajax : Activate to display the loading icon when running Ajax
  • Block spam : Activate to limit each IP maximum permitted only put 8 pending order