The result page displayed by the speedtest application contains an image with ping, jitter, download-speed and upload-speed.
This image is missing an alt tag to make it accessible for handicapped persons...

Although the results are displayed in HTML text above the image,
the image can not be handled by screenreaders
and persons with poor sight might wonder what is shown in the image.

As a solution to this problem you could insert the following code in the index.html:

                                 I("resultsImg").alt =
                                    "Download: " + uiData.dlStatus + " Mbps, " +
                                    "Upload: " + uiData.ulStatus + " Mbps, " +
                                    "Ping: " + uiData.pingStatus + " ms, " +
                                    "Jitter: " + uiData.jitterStatus + " ms";

(around line 164 ... 168)

In addition it would be very helpful to make the start button accessible for handicapped persons
by putting the label text in plain HTML and not "hiding" it in stylesheet definitions...
(For this suggestion I have no solution at hand...sorry...)