title: html5 canvas stroke twice drawing first stroke again
body: <p>I want to draw a line with one color, and the next line with a different color. But when I call stroke() the second time, the first line is draw again! How can I avoid it? Here's my code:</p>
  
  <pre><code>var canv = document.getElementById("canvas");
  var ctx = canv.getContext("2d");
  ctx.moveTo(0,0);
  ctx.lineTo(100,100);
  ctx.strokeStyle = "#FF0000";
  ctx.stroke();
  ctx.moveTo(100,100);
  ctx.lineTo(100,200);
  ctx.strokeStyle = "#999999";
  ctx.stroke();
  </code></pre>
  
  <p>Thanks in advance!</p>