webcam.capture is not a function at HTMLInputElement.onclick

You are loading the scripts in the wrong order! first u loads the library and then you load the script that has its code to be opening the camera! getting that order below ..

<script type="text/javascript" src="cam/jquery.webcam,js"></script>

<script  type="text/javascript" src="jQ.js"></script>

Best Regard
#SSTEAM