http://gyazo.com/4488be8b98a79bf67b4b6f96eb2b239b

                    success: function(data) {
                        if (data == 0 || data = 2) {
                            $("#usercheckdiv").addClass('checked');
                            $("#usercheckdiv").removeClass('unchecked');
                            document.getElementById("uservalid").value = 'valid';
                        } else if (data == 1) {
                            $("#usercheckdiv").addClass('unchecked');
                            $("#usercheckdiv").removeClass('checked');
                            document.getElementById("uservalid").value = '';
                        }
                    }