var barcodeBuf = "" var barcodeShown = false function showBarcode(text) { if (!barcodeShown) { document.getElementById('barcode').classList.add('shown') } document.getElementById('barcodeContent').textContent = text } function hideBarcode() { if (barcodeShown) { document.getElementById('barcode').classList.remove('shown') } return document.getElementById('barcodeContent').textContent } 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 if ( event.keyCode === 27 ){ barcodeBuf=hideBarcode() event.preventDefault() } else if ( event.keyCode === 9 ){ barcodeBuf = barcodeBuf.substring( 0, barcodeBuf.length - 1 ) if ( barcodeBuf.length <= 0 ) { barcodeBuf=hideBarcode() } event.preventDefault() } else { barcodeBuf += key showBarcode(barcodeBuf) event.preventDefault() } } }