title: SCRIPT438: Object doesn't support property or method 'join'
body: <p>I am encountering this error on Internet Explorer 9.0 under F12 development tools, in the following statement:</p>
  
  <pre><code>arr = [];
  for (i = 0; i &lt; items.length; i ++) {
    console.log(items[i]);
    arr.push(items[i].join(','));
  }
  </code></pre>
  
  <p>This method work on every browser except IE. Why isn't it working?</p>