title: stop the mouse down event of body on SVG mouse down
body: <p>Here, i am trying to stop the mouse down event of body when mouse down of SVG if fired. I also tried the <code>event.stopPropagation</code> but here it is not working.
  Here is my code.</p>
  
  <pre><code>var svgElem=document.getElementById("mySVG");
  svgElem.onmousedown=function(){
          event.stopPropagation();
          event.preventDefault();
          console.log("svg down");
      }
  document.body.onmousedown=function(){
          console.log("body down");
  }
  </code></pre>
  
  <p>body mouse down is fired after SVG mouse down.</p>