anchor.diff:  
   			keys.enter().append('li')
   			    .attr('class', 'key')
  -			    .style('border-top-color', String)
  +			    .style('border-right-color', String)
   			    .text(function(d) {
   			        var r = colorScale.invertExtent(d);
   			        return formatCount(r[0]);
   			    });
   
  -			histogram.width(600)
  -				.height(400)
  +			histogram.width(histWidth)
  +				.height(histHeight)
   				.margins({top: 10, right: 10, bottom: 20, left: 40})
   				.dimension(time)
   				.group(timeCounts)
  
positive.code: <%= javascript_include_tag  "dc" %>
  
  <style type="text/css" media="screen">
  
  h1 {
  	text-align: center;
  }
  
  h2 {
  
negative.code: 
  <script>
  
  	var margin = {top: 10, left: 10, bottom: 10, right: 10};
  
  	var mapWidth = parseInt(d3.select('#choropleth').style('width'))
  	  , mapWidth = mapWidth - margin.left - margin.right
  	  , mapHeight = parseInt(d3.select('#choropleth').style('height'))
  	  , mapHeight = mapHeight - margin.top - margin.bottom;
  
  	var histWidth = parseInt(d3.select('#histogram').style('width'))
  	  , histWidth = histWidth - margin.left - margin.right
  	  , histHeight = parseInt(d3.select('#histogram').style('height'))
  	  , histHeight = histHeight - margin.top - margin.bottom;
  
  	var pieWidth = parseInt(d3.select('#pie').style('width'))
  	  , pieWidth = pieWidth - margin.left - margin.right
  	  , pieHeight = parseInt(d3.select('#pie').style('height'))
  	  , pieHeight = pieHeight - margin.top - margin.bottom;
  
  	var parseDate = d3.time.format("%m/%d/%Y %I:%M:%S %p").parse;
  	var formatDate = d3.time.format("%m/%y");
  