<html> <head> <script type="text/javascript"> window.onload = function() { var ctx = document.getElementById("c1").getContext("2d"); ctx.lineWidth = 5; ctx.setLineDash([ 5, 10 ]); // 5 on, 10 off ctx.moveTo(50, 50); ctx.lineTo(250, 50); ctx.stroke(); ctx.beginPath(); ctx.lineDashOffset = 5; ctx.moveTo(50, 100); ctx.lineTo(250, 100); ctx.stroke(); ctx.beginPath(); ctx.lineDashOffset = 5; ctx.setLineDash([ 5 ]); // 5 on, 5 off ctx.moveTo(50, 150); ctx.lineTo(250, 150); ctx.stroke(); ctx.beginPath(); } </script> </head> <body style="padding: 0px; margin: 0px;"> <div><canvas id="c1" width="300" height="300"></canvas></div> </body> </html>