Fix something wrong in index.html template

[issei-m]

• Fix some syntax errors of HTML
• Remove useless JavaScript code
• Fix indent

[issei-m]

ping @zr-msft since you seem to be a person who made the latest merge commit.
If you had the time to review it, please see it.
Regards.

[Point-SimoSiren]

ping @issei-m Hello, this interesting tutorial. I tried to change names other than purple and blue, and app doesnt work anymore. I wonder is it really so that app can handle only dog, cat and blue, purple ? Another question is that why you have left button onClick(send) handlers if u removed the script? I have seen input type submit but is this send similar inside form?

[issei-m]

I'll take it on this weekend :)

[issei-m]

@Point-SimoSiren I could rename the caption of the buttons by updating config_file.cfg where the captions of them are defined, so try it on.

And leaving the onclick handlers was just my mistake, I fixed it, Thanks pointing out it.