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    <p>If I understood you correct, you can use the following code to upload the file async. Modify it as you like</p> <pre><code>var AjaxFileUploader = function () { this._file = null; var self = this; this.uploadFile = function (uploadUrl, file) { var xhr = new XMLHttpRequest(); xhr.onprogress = function (e) { ... }; xhr.onload = function (e) { ... }; xhr.onerror = function (e) { ... }; xhr.open("post", uploadUrl, true); xhr.setRequestHeader("Content-Type", "multipart/form-data"); xhr.setRequestHeader("X-File-Name", file.name); xhr.setRequestHeader("X-File-Size", file.size); xhr.setRequestHeader("X-File-Type", file.type); xhr.send(file); }; }; AjaxFileUploader.IsAsyncFileUploadSupported = function () { return typeof (new XMLHttpRequest().upload) !== 'undefined'; } if (AjaxFileUploader.IsAsyncFileUploadSupported) { ajaxFileUploader = new AjaxFileUploader(); $("form").submit(function () { var uploader = $("#fileUploader")[0]; if (uploader.files.length == 0) { return; } else { ajaxFileUploader.uploadFile( "/YourUploadUrl", uploader.files[0]); } return false; }); } </code></pre> <p>To upload the form use the FormData class, populate it with form values and post it with XHR.</p> <p><strong>Update:</strong> For HTML4 try the following </p> <ul> <li><a href="http://www.albanx.com/?pid=5&amp;subid=21" rel="nofollow noreferrer">http://www.albanx.com/?pid=5&amp;subid=21</a></li> <li><a href="https://stackoverflow.com/questions/1276916/asynchronous-file-upload-ajax-file-upload-using-jsp-and-javascript">Asynchronous file upload (AJAX file upload) using jsp and javascript</a></li> </ul>
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    1. POAJAX file upload/form submit without jquery or iframes?
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    1. POAJAX file upload/form submit without jquery or iframes?
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    1. COi assume that this solution will work only in HTML5 supported browsers, correct me if i am wrong, so if browser doesn't support it then you have to provide a fallback method which will be using iframes i guess
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    2. COYeah. I'm starting to think there isn't a non-HTML5 and non-IFrames route.
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    3. COYes, this solution will work in HTML5 only. Try to find some polyfill for the FileUploader. I looked here https://github.com/Modernizr/Modernizr/wiki/HTML5-Cross-browser-Polyfills, but seems like there is no file uploader replacer. In any case I think it will not take much time to rewrite the code above to work in HTML4
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