var barcodeBuf = "" var barcodeShown = false function showBarcode(text) { if (!barcodeShown) { document.getElementById('barcode').classList.add('shown') } document.getElementById('barcodeContent').textContent = text } function barcodeKeyPress(event) { var key = String.fromCharCode(event.charCode) var input = document.getElementById('crement') if ( input ) { input.focus() } var focused = document.activeElement if (! focused || focused == document.body) { focused = null } else if (document.querySelector) { focused = document.querySelector(":focus") } if (focused == null || focused.tagName != "INPUT") { if (event.keyCode === 13) { var input = document.getElementById('barcodeInput') if (input) { input.setAttribute('value', barcodeBuf) input.parentNode.submit() return } barcodeBuf = "" event.preventDefault() } else { barcodeBuf += key showBarcode(barcodeBuf) event.preventDefault() } } }