title: string concatenation using javascript
body: <p>I'm trying to build a HTML string in the following way:</p>
  
  <pre><code>htmlString = '&lt;html&gt;';
  var headerString = "image1";
  var sImage = "Android_images/"+headerString+".png";
  htmlString += '&lt;img src='+sImage+' /&gt;';
  htmlString = '&lt;/html&gt;';
  </code></pre>
  
  <p>I need to dynamically append a image string, but it shows:</p>
  
  <pre><code>&lt;img src=Android_images/dfdfd.png /&gt;
  </code></pre>