This is a very tiny JSXGraph example introducing JessieScript. Absolutely no JavaScript programming knowledge is required to do this.
All you need to do is to include one JSXGraph CSS and one JSXGraph js file
<link rel="stylesheet" type="text/css" href="../distrib/jsxgraph.css" /> <script type="text/javascript" src="../src/loadjsxgraph.js"></script>
into your HTML document and to describe your construction with JessieScript:
<script type="text/jessiescript"> A(1,1); B(2,2.5); C(1,3); [AB]; k(B,[AC]); </script>
JSXGraph will then place a board right where you placed your JessieScript.