I am not a java expert

but searching Google I got below information which may be helpful for you.
If you are using javascript you may have to face many problems like, many webbrowsers that don’t support javascripts, also as a security measure most webusers disable it for their browser thus your java based code wont run.
so if you want to inform webusers about your JavaScript code and what it does then you will have to use <noscript> tags so that they can enable it for their browser.
Using <noscript> tag you can provide information to your users whenever JavaScript cannot be run on a particular browser. make sure this <noscript> tag is ignored by browsers which support JavaScript;
Eg….
<noscript>This page is trying to run JavaScript and your browser either does not support JavaScript or you may have turned-off JavaScript. If you have disabled JavaScript on your computer, please turn on JavaScript. Thank you</noscript>