title: background color change in jquery highcharts
body: <p>Like to know how to change the background color of jquery highcharts. i try the code on highcharts site (<a href="http://www.highcharts.com/demo/spline-irregular-time/gray" rel="nofollow">http://www.highcharts.com/demo/spline-irregular-time/gray</a>) but couldn't get it to work.  this is my highcharts code i have. any help will be appreciated. thank you.</p>
  
  <pre><code>&lt;script type="text/javascript"&gt;
              var chart;
  $(document).ready(function() {
     chart = new Highcharts.Chart({
        chart: {
           renderTo: 'stats_vmonth',
           type: 'spline'
        },
              title: {
           text: 'Visitor Stats'
        },
        subtitle: {
           text: 'This Month (&lt;?php echo $thismonth;?&gt;)'   
        },
        xAxis: {
           type: 'datetime',
           dateTimeLabelFormats: { // don't display the dummy year
              month: '%e. %b',
              year: '%b'
           }
        },
        yAxis: {
           title: {
              text: 'Visitors'
           },
           min: 0
        },
        tooltip: {
           formatter: function() {
                     return '&lt;b&gt;'+ Highcharts.dateFormat('%e, %b', this.x) +'&lt;/b&gt;&lt;br/&gt;'+
                 this.y +' Visitors';
           }
        },
        series: [{
           name: 'This Year Visitor Stats',
           // Define the data points. All series have a dummy year
           // of 1970/71 in order to be compared on the same x axis. Note
           // that in JavaScript, months start at 0 for January, 1 for February etc.
           data: [
          &lt;?php while($morow = mysql_fetch_array($moresult)){?&gt;
              [Date.UTC(&lt;?php echo $year;?&gt;, &lt;?php echo $month-1;?&gt;, &lt;?php echo $morow['day'];?&gt;),  &lt;?php echo $morow['COUNT(url)'];?&gt;   ],
          &lt;?php }?&gt;
  
           ]
        }]
     });
  
  
  });
          &lt;/script&gt;
  </code></pre>