This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
The applet tag -which is what getElementById returns- does not have a "value" attribute. If you want to access data in the applet, write a public method that returns it, and call it like document.getElementById('appletbarcode').getValue().