Retrive Menu from database to asp.net With CSS Menu item not toggling

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ASP.NET

Javascript

i got some javascript like this to add menu to asp.net form. but when i am trying to reduce the size for the windows its not toggling. just hiding the menu bar. What is the wrong with this code.

function sh() {
          if (ww < 1020) { $(".menutd").hide(); $("#slideimg").attr('src', '/Images/Right-Arrow.png'); }
          else { $(".menutd").show(); $("#slideimg").attr('src', '/Images/Left-Arrow.png'); }
          if (ww < 980) { $(".bdiv").width(980); $(document.body).css("overflow", "scroll"); }
          else { $(".bdiv").width(ww); $(document.body).css("overflow", "hidden"); }
          $(".slidertd, .lmenucont").height(wh - 82);
          $("#contframe").height(wh - 78);
          $("#treemenu").show('slow'); hp();
      }