Point
From JSXGraph Wiki
This example shows how to construct a simple, draggable point:
It is produced by the following commands:
<script type="text/javascript">
var board = JXG.JSXGraph.initBoard('jxgbox', {originX: 200, originY: 100, unitX: 50, unitY: 50});
var p = board.createElement('point',[1,1]);
</script>