"Invalid JSON primitive" in JQery, Ajax

Data Should Be written in this form if the argument is string data:'{Pid:'+ JSON.stringify(faram)+'}', or data:"{Pid:'"+ JSON.stringify(faram)+"'}", Success success: function(msg) { var orders =msg; if (orders.length > 0) { alert(orders); To Show The Errors error: function(xhr, textStatus, errorThrown) { alert(xhr.status); alert(errorThrown); alert(xhr.responseText);