On 7/22/12 8:43 PM, Prakash Ranganthan wrote:
Hi friends i tried blocking keyboard input but it also blocks barcode
input any idea how to proceed with blocking only keyboard input in
textbox and allowing barcode input.
var barcode = document.getElementById('userid');
barcode.addEventListener("keypress", function() { alert("Please use
Barcode Scanner!"); document.getElementById('userid').value = "";}, true);
The barcode readers I've used just generate keystrokes, so as far as the
browser's concerned, it's all keystrokes. However, the keystrokes from
the reader usually come quickly and consistently, so maybe you could
measure the time between keystrokes and differentiate that way.
Of course whatever reader you're using may work differently.
Brian
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