How to add child item using asp.net in menu control?

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ASP.NET

MVC3

I am using asp.net menu control.
i am not able to add more than 1 child menu item to parent item. i am able to get
from database but can't able display in parent menu.

i am using for loop code

my code is;-

           var g = json.st.length;

           alert("displaying values: " + g);

           var menu = new dhtmlXMenuObject("menuObj");

           menu.attachEvent("onTouch", menuTouch);


           {

               for (i = ((json.st.length) - 1); i >= 0; i--) {

                   alert("displayed data: " + json.st);

                   menu.addNewSibling(null, "a", json.st[i], false);



                   {

                      // if (json.r.length == 0)

                       {
                           // foreach (menu.addNewChild)


                          // foreach(menu.addNewChild)

                           {

                               menu.addNewChild("a", 0, "new", json.r[i], false);

                           }

                       }

                       alert("displaying data: " + json.r);
                   }
what i have use for displaying child item 


 
 Pls. give the for loop to add the every child item to its parent item

 i am getting struggle last two days...?


Thanks you