JQuery if statement can't get attr value

This is working for me. But I'm not sure if .attr addes value

$(function() {
                $("input.upb").change(function (){
                    var fileName = $(this).val();
                    $(".added").html("Selected file(s) was added successfully").css("color","darkgreen").attr("id", "added");
                });
            });

Is this statement misspelled?

$(function(){
            if($("input.upb").attr("id")=='added'){
                    $("input.post").click(function (){
                        $(".post").attr("value","Uploading ...");
                        $(".progressbar").css("opacity", 1);
                    });
        }});

If statement not working :-(