How to decode Json value through Jquery

Hi!
I am novice to Jquery.
Iam getting following Json output from PHP file :

{“jval”:{“wine”:3,“sugar”:4,“lemon”:22}}

how can I decode/get these Json values in Jquery.

I am using following Javascript code to get Json values [in Javascript] :

var value = eval( data );
alert(value);

But alert shows ‘Object’ ‘Object’ message.

Can some one solve my problem.

Thanks in advance

The JSON in Javascript page has your answer for you.

The code linked at the bottom of the page provides a parser, as well as a stringifier.

Thanks for guidance. I have included Json2.js file, but it is giving me error as follows:

text.replace is not a function
http://localhost/main/js/json2.js
Line 455

Can some be made on this error also ?

Thanks

Does it help to know that the data being parsed must be a text representation of the JSON object, not an actual object itself?