Question

I have a simple file upload form. How do I make it submit automatically when a file has been selected? I don’t want the user to have to click the Submit button.

Answer 1

You can simply call your form’s submit method in the onchange event of your file input.

document.getElementById("file").onchange = function() {
    document.getElementById("form").submit();
};

http://jsfiddle.net/cwvc4/73/