fix text

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:[-5, 5, 5,-5], axis: false, grid: true});

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 "The new text is " + p.plaintext +' ' + t.plaintext ; }]);
//p.addChild(y);
//t.addChild(y);

p.setText('go');
board.update();