title: Javascript parseFloat and nulls
body: <p>I am very new to javascript as I am currently making a cross platform web app in jQuery Mobile, I have used the example of XML Parsing to a HighCharts graph yet when I encounter a null in my series data it fails to draw any of the line and makes it into a scatter plot almost.</p>
  
  <pre><code>// push data points
  $(series).find('data point').each(function(i, point) {
      seriesOptions.data.push( 
          parseFloat($(point).text())
      );
  });
  </code></pre>
  
  <p>I have no idea how to write a if statement that checks to see if it found a null and if so how to tell it to use it... Can anyone please help or point me in the right direction as I would love my charts to be correct rather than placing a zero value where I have a null.</p>