title: Draw with finger in html on ipad?
body: <p>I´m trying to write with finger in canvas element. It works on desktop browsers but not in the ipad.<br>
  I try with touchstart, touchend, touchmove event too, but it doesn´t work on ipad.</p>
  
  <pre><code>var pizarra_canvas
  var pizarra_context
  
  function init(){            
      pizarra_canvas = document.getElementById("pizarra");
      pizarra_context = pizarra_canvas.getContext("2d");
      pizarra_context.strokeStyle = "#000";
      pizarra_canvas.addEventListener('mousedown',empezarPintar,false);
      pizarra_canvas.addEventListener('mouseup',terminarPintar,false);
      }   
  
  function empezarPintar(e){
  pizarra_context.beginPath();
  pizarra_context.moveTo(e.clientX-pizarra_canvas.offsetLeft,e.clientY-pizarra_canvas.offsetTop);
  pizarra_canvas.addEventListener('mousemove',pintar,false)
  }
  
  function terminarPintar(e){
  pizarra_canvas.removeEventListener('mousemove',pintar,false);
  }
  
  function pintar(e) {
  pizarra_context.lineTo(e.clientX-pizarra_canvas.offsetLeft,e.clientY-pizarra_canvas.offsetTop);
  pizarra_context.stroke();
  }
  </code></pre>