title: jquery-Flot using <Div> with % width and height
body: <p><br>
  I am using Flot Jquery library, 
  I want to set the placeholder div dimension (height and width) in % <br><code>&lt;div id="placeholderYear" style="width:50%;height:30%;"&gt;&lt;/div&gt;</code>
  <br>But I get always the exception: <br>
  "JavaScript runtime error: Invalid dimensions for plot, width = 360, height = 0"</p>
  
  <p>How can I fix it?
  Thanks,Nk</p>