How to read a fingerprint from user to a web application and send to server?

I have a web based protocol system (JavaScript frontend and backend LAMP). It basically controls the sending and receiving of documents. Currently, when someone physically withdraws a document, he / she signs a document to prove it. What I want is for this person to put his finger on a scanner and it will be stored on the server instead of signing a document to prove who took the document. How can I read the fingerprint from a USB device and send it to the server using a browser-based application? I have seen that some fingerprint scanners come along with a SDK which brings code examples in C #, java, etc., but none using JavaScript so far ...