add events

add click events

HTML

<script src="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraphcore.js"></script>
<link rel="stylesheet" href="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraph.css">
<div id="jxgbox" style="width: 500px; height: 500px;"></div>

JavaScript

var board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox: [-10, 10, 10, -10], axis: true});

JXG.addEvent(document.getElementById('jxgbox'), 'click', function (e) {
    var coords = new JXG.Coords(JXG.COORDS_BY_SCREEN, board.getMousePosition(e), board);
    board.create('point', coords.usrCoords.slice(1));
}, this);