If you try and store and retrieve a JSON object in a cookie using the cookie plugin (http://plugins.jquery.com/project/cookie), you get an unexpected result.
For instance, save into cookie: $.cookie("mydata", {foo:"bar",baz:1}); Retrieve value: var mydata = $.cookie("mydata"); But that returns [object Object] A json parser (e.g. http://www.json.org/js.html) has to be used. Using this script, you can 'stringify' the object before storing it: $.cookie("mydata", JSON.stringify({foo:"bar",baz:1})); Then you retrieve it and use JSON.parse: var mydata = JSON.parse($.cookie("mydata")); While this is a workaround, perhaps it may be a good idea if the cookie plugin did this automatically (i.e. convert object to string and back again)? Rather than building in JSON parsing, maybe make the json.org parser a prerequisite? Then a check is done in the plugin code: if(typeof JSON != "undefined") { if(typeof value == "object") value = JSON.stringify(value); }