html5异步上传图片显示上传文件进度条

<html>

    <head>



    </head>

    <body>

            <p>

    emo_album_id:<input type="text" name="emo_album_id" id="emo_album_id" value='1'>

</p>

<p>

    name:<input type="text" name="title" id="title">

</p>

            <div class="row">



                <label for="file">

                    Upload Image:</label>

                <input type="file" name="fileToUpload" id="fileToUpload"  multiple="multiple" onchange="fileSelected();" />

            </div>

SentenceMovie[photo]

            <div id="fileName">

            </div>

            <div id="fileSize">

            </div>

            <div id="fileType">

            </div> 

            <div id="progressNumber">

            </div>



        <script>

                    function fileSelected() {

                        var file = document.getElementById('fileToUpload').files[0];

                        if (file) {

                            var fileSize = 0;

                            if (file.size > 1024 * 1024)

                                fileSize = (Math.round(file.size * 100 / (1024 * 1024)) / 100).toString() + 'MB';

                            else

                                fileSize = (Math.round(file.size * 100 / 1024) / 100).toString() + 'KB';



                            document.getElementById('fileName').innerHTML = 'Name: ' + file.name;

                            document.getElementById('fileSize').innerHTML = 'Size: ' + fileSize;

                            document.getElementById('fileType').innerHTML = 'Type: ' + file.type;

                            uploadFile();

                        }

                    }



                    function uploadFile() {

                        var fd = new FormData();

                        fd.append("upload_file", document.getElementById('fileToUpload').files[0]);

                        fd.append("emo_album_id", document.getElementById('emo_album_id').value);

                        fd.append("title", document.getElementById('title').value);

                        var xhr = new XMLHttpRequest();

                        xhr.upload.addEventListener("progress", uploadProgress, false);

                        xhr.addEventListener("load", uploadComplete, false);

                        xhr.addEventListener("error", uploadFailed, false);

                        xhr.addEventListener("abort", uploadCanceled, false);

                        xhr.open("POST", "http://mysae.com/emotions/1/api/index.php/emo/upload");

                        xhr.send(fd);

                    }



                    function uploadProgress(evt) {

                        if (evt.lengthComputable) {

                            var percentComplete = Math.round(evt.loaded * 100 / evt.total);

                            document.getElementById('progressNumber').innerHTML = percentComplete.toString() + '%';

                        }

                        else {

                            document.getElementById('progressNumber').innerHTML = 'unable to compute';

                        }

                    }



                    function uploadComplete(evt) {

                        /* This event is raised when the server send back a response */

                        alert(evt.target.responseText);

                    }



                    function uploadFailed(evt) {

                        alert("There was an error attempting to upload the file.");

                    }



                    function uploadCanceled(evt) {

                        alert("The upload has been canceled by the user or the browser dropped the connection.");

                    }

        </script>

    </body>

</html>

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