Breadcrumb with iframe

Hi ALL,
             I have develope web application with dropdown menu style. All pages loaded into iframe which is include in master page, Master page have dropdown menus (ui,li) and iframe, according to selection of link page will get loaded into iframe using javascript.Now i want to dispaly breadcrump upto current page.can you please suggetst me that how can i handle same thing in asp.net with iframe.


Example :
ABC   :     DEF     :  GHI ============Main Menu
abc ======== Child Menu

def -> jkl======= Sub Child Menu

          mno
          pqr



So when i am on page "mno" breadcrums like ABC > def > mno
When user again mouse over o ...