Generate only JSOn string in output

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ASP.NET

Hi,

I am developing a webiste in ASP.NET. On one of the pages page named menu.aspx, with the help of a certain login, I am getting the output in this format

foo({"1":"Jeff","2":"Mik","5":"Tom"});

I am using this code to get the output on the JSON form.

outputText += Convert.ToString(k.GetValue(0));
              for (Int32 i = 1; i < k.Length; i++)
              {
                  outputText += "," + Convert.ToString(k.GetValue(i));
              }
              //
              outputText += "}" +");";
              Response.Clear();
              Response.Write(outputText);
              Response.ContentType = "application/json";

However, I must get the output only in simple JSON on the page without any HTML.

For eg: Here's the screenshot showing the source of the output page. http://i.imgur.com/faUtY.jpg[^]

Notice that it has only the JSON string as the output.

And here's the screenshot showing the output page source (with HTML). http://i.imgur.com/gIxzR.jpg[^] .This HTML is what I have to remove. How can do I do this?
The full code of menu.aspx.cs is putup here. http://pastebin.com/M14Srrgf[^]