Android virtual keyboard pop-up issue on focus

view story

http://android.stackexchange.com – We are using a web app (built for desktop) in Android tablet (Motorola ET1). Issue is that android soft keyboard is popping up whenever focus goes to a text box. On page load, focus is set to the text box but keyboard is not popping on page load. Users scan input data using tablet's scanner into this text box, we take scanned input and submit to the server. If the transaction is successful, text box gets cleared and focus is set in this text box to scan next input. when focus is set this time, android keyboard is popping up. I tried using blur to prevent keyboard popup, it prevents keyboard (HowTos)