http://www.webcodegeeks.com/html5/html5-file-upload-example/

http://igstan.ro/posts/2009-01-11-ajax-file-upload-with-pure-javascript.html

http://www.matlus.com/html5-file-upload-with-progress/

http://howtodoinjava.com/jersey/jax-rs-jersey-ajax-multi-file-upload-example/

https://www.npmjs.com/package/jquery-simple-upload

http://www.anyexample.com/programming/php/php_ajax_example__asynchronous_file_upload.xml

http://laravel.io/forum/07-05-2015-ajax-file-upload-with-jquery-cannot-get-file-from-request