title: Flot pie chart gives error in firebug: "uncaught exception: Invalid dimensions for plot, width = null, height = null"
body: <p>I using <a href="https://github.com/flot/flot" rel="noreferrer">flot</a> pie chart for plotting pie charts. but it shows error in firebug that</p>
  
  <blockquote>
    <p>uncaught exception: Invalid dimensions for plot, width = null, height
    = null</p>
  </blockquote>
  
  <p>I have given the height and width from stylesheet also. and tried also like this </p>
  
  <p><code>&lt;div id="placeholder1" style="width:140px;height:140px" &gt;&lt;/div&gt;</code> </p>
  
  <p>how to resolve this?</p>