title: How to preload iframes
body: <p>I am having multiple iframes to display data in a page.<br>
  I want to preload the next 3 iframes while viewing current view. am doing like the below:</p>
  
  <p>I will hide the all iframes and set the source for it.<br>
  When I clicked on a particular view I will show it and in background I will load the next 3 iframes.<br>
  while doing this, some loading is showing in browser tab and it doesn't look good at all. </p>
  
  <p>How to get rid of this loading in browser for usability?</p>