var Scanner = new Object();
Scanner.KeyString = '';
Scanner.LastInputTime = 0;
Scanner.Form = null;
Scanner.Input = null;


Scanner.handleKey = function (iKey)
{
	var iNow = new Date().getTime();
	if (iKey == 13) {
		if (iNow - Scanner.LastInputTime > 1000) {
			Scanner.KeyString = '';
		}
		Scanner.LastInputTime = iNow;
		if (Scanner.KeyString != '') {
			Scanner.Input.value = Scanner.KeyString;
			Scanner.Form.submit();
		}
	} else if (iKey >= 48 && iKey <= 57) {
		if (iNow - Scanner.LastInputTime > 1000) {
			this.KeyString = '';
		}
		Scanner.LastInputTime = iNow;
		Scanner.KeyString += String.fromCharCode(iKey);
	}
}

Scanner.register = function ()
{
	Scanner.Form = document.createElement('form');
	Scanner.Form.action = window.location;
	Scanner.Form.method = 'post';
	Scanner.Form.name = 'scanner_form';

	Scanner.Input = document.createElement('input');
	Scanner.Input.type = 'hidden';
	Scanner.Input.name = 'scanner_product_barcode';
	Scanner.Form.appendChild(Scanner.Input);

	document.body.appendChild(Scanner.Form);

	var fOldOnkeyup = document.onkeyup;
	document.onkeyup = function (e) {
		var oEvent = e || window.event;
		Scanner.handleKey(oEvent.keyCode || oEvent.which);
		if (fOldOnkeyup) fOldOnkeyup(e);
	}
}

/** Register event for when DOM is loaded. */
DOMEvents.register(function () { Scanner.register(); });