area between two curves
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="fig" class="jxgbox" style="width:336px; height:279px; border-radius:0pt; border-color:black "></div>
JavaScript
var figura = JXG.JSXGraph.initBoard('fig', {
boundingbox:[-2.5, 18, 18,-2]
// axis:true,
// grid:false,
}
);