title: There is no attribute "allowtransparency"
body: <p>I am looking for some alternate way to do:</p>
  
  <pre><code>&lt;iframe transparency=true   ...
  </code></pre>
  
  <p>When I do the W3C validation, I am getting the error:</p>
  
  <pre><code>Column 31: there is no attribute "allowtransparency"
  </code></pre>
  
  <p>If use this CSS,</p>
  
  <pre><code>.iframe-trans-fix{
     opacity: 0;
     filter:alpha(opacity=0);
  }
  </code></pre>
  
  <p>for the above snippet I am getting a blank iframe.</p>