Today Badly java script error

Today, I've got badly Java script error in my work project. I was trying to get cookie value from Java script file. I need to explain more. The project is need dynamic menu.
That menu is created by when u create new page. that page should be added to menu list automatically. I tried to get cookie value like that - ( here we are some coding -

private void MenuList()
{
List menu_list = MenuController.GetMenuList();
List First_list = new List();
List Second_list = new List();
List Third_list = new List();

string strMenu = string.Empty;

if (menu_list.Count > 0)
{
for (int i = 0; i < menu_list.Count; i++)
{
if (menu_list[i].ParentID == Guid.Empty)
{
// find second level menu
Second_list = GetSubMenu(menu_list, menu_list[i].MenuID);

// print out the first level with

closing tag if second list count = 0; else print out the first level without

closing tag
if (Second_list.Count > 0)
{
string strSecondLevel = string.Empty;

//print out the first level
//strMenu += "

" + menu_list[i].Name + "";
strMenu += "

" + menu_list[i].Name + "";

HttpCookie MyCookie = HttpContext.Current.Request.Cookies["menu"];
if (MyCookie == null)
{
MyCookie = new HttpCookie("menu");
}

// open the second level
strMenu += "

";

for (int j = 0; j < Second_list.Count; j++)
{
//remove second level list from main list
for (int count = 0; count < menu_list.Count; count++)
{
if (Second_list[j].MenuID == menu_list[count].MenuID)
{
menu_list.RemoveAt(count);
i--;
}
}

// find third level menu
Third_list = GetSubMenu(menu_list, Second_list[j].MenuID);
if (Third_list.Count > 0)
{
// print out the second level without closing
• tag
  //strMenu += "
• " + Second_list[j].Name + "";
  strMenu += "
• " + Second_list[j].Name + "";
  
  // open the third level
  strMenu += "
  ";
  
  foreach (Menus m3 in Third_list)
  {
  // print out the third level
  //strMenu = "
  • " + m3.Name + "
  ";
  strMenu = "
  • " + m3.Name + "
  ";
  
  //remove third level menu from the main list
  for (int c = 0; c < menu_list.Count; c++)
  {
  if (m3.MenuID == menu_list[c].MenuID)
  {
  menu_list.RemoveAt(c);
  i--;
  }
  }
  }
  
  //close the third level
  strMenu += "
  ";
  //close the second level
  strMenu += "

";
// close the first level
strMenu += "

";

int index2 = Second_list.IndexOf(Second_list[j]);
Second_list.InsertRange(index2 + 1, Third_list);
}
else
{
// print out the second level
for (int m = 0; m < Second_list.Count; m++)
{
//strMenu += "

" + Second_list[j].Name + "

";
strMenu += "

" + Second_list[j].Name + "

";
}
// close the second level
strMenu += "";
// close the first level
strMenu += "";

int index1 = menu_list.IndexOf(menu_list[i]);
menu_list.InsertRange(index1 + 1, Second_list);

}
}
}
else
{
//strMenu += "

" + menu_list[i].Name + "

";
strMenu += "

" + menu_list[i].Name + "

";
}
}
}

navigationMenuList.InnerHtml = strMenu;
}
}

In above code has bold sentence. that sentece is trying to get cookie value from anchor tag on click event. I have no idea yet. :( BAD Day