ruby embedded highcharts js

highcharts js code

<div id="fb_chart" style="width: 100%; height: 300px;"></div>  

<% content_for :javascripts do %>

  <script type="text/javascript">

 new Highcharts.Chart({  
        chart: { renderTo: 'fb_chart', defaultSeriesType: 'area' },  
        title: { text: 'Facebook Publish to Token Rate per Day' },  
        xAxis: { type: 'datetime' },  
        yAxis: {  
          title: { text: false }  
        },  
        tooltip: {  
          formatter: function () {  
            return Highcharts.dateFormat("%B %e %Y", this.x) + ': ' +  
            + Highcharts.numberFormat(this.y, 2);}  
        },
        series: [{  
          name: "Total Tokens",  
          pointInterval: <%= 1.day * 1000 %>,  
          pointStart: <%= 3.weeks.ago.at_midnight.to_i * 1000 %>,  
          data: <%= (3.weeks.ago.to_date..Date.today).map { |date| FbToken.total_on(date).to_i}.inspect %>
        }, 
        {  
          name: "Published",  
          pointInterval: <%= 1.day * 1000 %>,  
          pointStart: <%= 3.weeks.ago.at_midnight.to_i * 1000 %>,  
          data: <%= (3.weeks.ago.to_date..Date.today).map { |date| FbToken.published.total_on(date).to_i}.inspect %>
        }]  
      });  

      </script>
    <% end %>