toJSONString giving error

[karthik]

Hi all,
I am new to this JSON stuff and this is what i am trying, but not succeeding in doing it,

var arr = { "one": [{ "firstname": "raj","lastname": "shyam"}], "two": [{"empno": "123","empname": "g.karthik"}, {"empDeptId": "124","empBranchName": "mec"}]}
alert(arr .toJSONString());

But this toJSONString() is throwing me an error, saying that toJSONString is not a function.
Do we need to put any extra js files to serialize the JSON data.
Any suggestions.

[jay@moduscreate.com]

Try Ext.decode or Ext.encode (read the docs)