Need to read a file name from rich fileupload using JavaScript to do a client side validation for file name:

<script>
function uploadorderclicka(){console.log("fileNameValidation: sdf");
     var input = document.getElementById("fileupload");</script>
     console.log('input' , input);}
<rich:fileUpload fileUploadListener="#{classA.method}" onupload="uploadorderclicka()"></rich:fileUpload>