hello check this code!

var boxval = $("#content").val();
var dataString = 'content='+ boxval;
var fanid = $("#fw").val();
var fidvalue = 'fw='+ fanid;

$.ajax({
  type: "POST",
  url: "update.php",
  data: dataString ,   
  cache: false,
  success: function(html){

but now i am getting dataString value , i want to pass fidvalue also

how to get that in update.php

help me