I am currently following this tutorial to have a file picker functionality.
<http://www.alecjacobson.com/weblog/?p=1645>

I would like to add wai-aria attribute for "choose file" part to make it readable. I have tried to use aria-controls and tabindex but couldnt get any positive response when i simulate some validators.. Any idea?

```
<body>
    <input id="file" type="file" multiple onchange="startRead()">
    <h3>Progress:</h3>
    <div style="width:100%;height:20px;border:1px solid black;">
    <div id="bar" style="background-color:#45F;width:0px;height:20px;"></div>
    </div>
    <h3>File contents:</h3>
    <pre>
        <code id="output">
        </code>
    </pre>
</body>

```