All you have shown us (which is not a part on an appinventor aia project) is a short javascript script. You have not really shown what you are trying to achieve, and how, making it very difficult for others to advise on what you should do.
Please provide more detail, your appinventor app / blocks, arduino code (HC05), html code, and how you expect it to all work together....
You also can read again how to ask questions to be able to get answers here in this community