title: select different image for canvas background
body: <p>I need to know how can I change the image background in canvas to draw what is needed in the selected image?</p>
  
  <p>I use this script <a href="http://www.williammalone.com/articles/create-html5-canvas-javascript-drawing-app/" rel="nofollow noreferrer">William malone canvas</a>
   and I can save the image in DB...the only thing I don't figure is how can I change the background..</p>
  
  <p>EDITED--
  My question is how can I change the background image in canvas WITHOUT reload the page...per example with a select list or checkbox or radio button</p>
  
  <p>like this but need to change without reload the page</p>
  
  <p><img src="https://i.stack.imgur.com/61YPs.jpg" alt="pies"> 
  <img src="https://i.stack.imgur.com/PGL6z.jpg" alt="face"></p>