How populate value of a field

amir7sh

Hello friends

I want populate value of a field from another table use jquery $.ajax method
code :

{ data: null,
render : function ( data, type, full, meta ) {
$.ajax({
            type: "POST", 
                    url: "funcs.php", 
                    data: {id : data.id},
                    dataType: "json", 
                    processdata: true,
            cache: false,                   
                    success: function (json) {
                        result = json;
                    }
                    });
                  return result;
                }
            }

But the code did not work and I saw this error :
ReferenceError: result is not defined .

Where is the problem?