HTML5 Canvas - How to Draw a line over an image background?

Question

I am trying to draw a line on top of an image background - in an HTML5 Canvas . However always the line gets drawn behind the image . Actually the line gets drawn first and

Answer 1

To be more efficient, assuming you are going to be doing multiple redraws of this line or lines, would be to set the CSS background-image of the canvas to be your image.