title: unable to add scrollbar to svg
body: <p>i m trying to add scroll bar to the div which contains my svg doing this</p>
  
  <pre><code>&lt;div id="d3div" style="height: 70%;
      overflow: scroll;
      position: absolute;
      width: 50%;"&gt;
  
  
  var svg = d3.select("#d3div").append("svg")
           .attr("width", '100%')
           .attr("height", '100%')
          .append("g")
           .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
  </code></pre>
  
  <p>Acc to theory the svg dimensions should be greater than div so i did here. and i dont want to specify the svg dimensions in pixels..but if i give like above the div dosent show any scroll bar..please help</p>