jQuery session with jquery-json

jQuery session with jquery-json

Hi all,

I'm quite new to jQuery and I want to use one plugin, the jquery-json:
http://code.google.com/p/jquery-json/

I'm attaching the js like this:
<script type="text/javascript" src="jquery.json-1.3.js"></script>

And after that I'm doing the code below:
myfun = function(){


var thing = {plugin: 'jquery-json', version: 1.3};

var encoded = $.toJSON(thing);              //'{"plugin": "jquery-json", "version": 1.3}'
var name = $.evalJSON(encoded).plugin;      //"jquery-json"
var version = $.evalJSON(encoded).version;  // 1.3

function setSession(name, value) {

     $.session(name, value);

}

setSession('var1', "somevalue");

}


but I get the following errors:
jQuery is not defined
$.evalJSON is not a function

Please give some help, I need var1 value into the session. Later I will need to put it in an iframe and the value has to be available outside the iframe.. that's why I'm using the session plugin.

Thanks a ton in advance!