getting this error " $.toJSON is not a function "

Question

I'm trying to use jQuery and Ajax and I use this method. but I get the error $.toJSON is not a function in my firebug . where is the problem? I use jquery 1.3.2 . thanks ``` $(document).ready(function () { $("#S1").click(function () { $("#t1").slideToggle("fast"); $("#S1").css("background-color", "yellow"); var ID = $("#HiddenField2").attr("Value"); var params = new Object(); params.Key = ID; $.ajax({ type: "POST", url: "viewMessages.aspx/readen", data: $.toJSON(params), contentType: "application/json", dataType: "json", success: function () { } }); }); }); ```

Accepted Answer

That's correct.

There is no `$.toJSON()` function: http://api.jquery.com/jQuery.toJSON. Perhaps you want to use `JSON.stringify()` instead.

getting this error " $.toJSON is not a function "

Solution

Problem