title: Is an empty iframe src valid?
body: <p>I want an iframe to initially have <code>src</code> as blank and then once the page loads; call a JS function and then set the <code>src</code> value to an actual one..</p>
  
  <p>So is <code>&lt;iframe src="#" /&gt;</code> valid OR do I need to use something else like <code>javascript:;</code>, etc</p>