combine texts

HTML

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

CSS

#jxgbox {
    width: 700px;
    height: 700px;
}

JavaScript

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

var p = board.create('text', [1, 1,'NO']);

var t = board.create('text', [-1, 1, 'Test']);

var y = board.create('text',[2, 2, function () {
    return p.plaintext + ' ' + t.plaintext;
}]);
p.addChild(y);
t.addChild(y);


//p.setText('foo');
board.update();