<html><body><canvas id="myCanvas" width="300" height="150" style="border:1px solid #d3d3d3;">Your browser does not support the HTML5 canvas tag.</canvas><script>var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.rect(20,20,150,100);if (ctx.isPointInPath(20,50)) { ctx.stroke(); };</script> </body></html>