Untitled

The one i use:
<html>
<body>
    <div style="width:100%; height:100%; background-color:transparent;">
    <iframe src="http://www.randomwebsite.com/" frameborder="0;" scrolling="no"; style="width:100%; height:100%;" >
    </iframe>
  </div>
</body>
</html>

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Another one i've tried:
<html>
<style type="text/css">
html,body{
width:100%;
height:100%;
margin:0px;
padding:0px;
}
</style>
<body>

  <div style="width:100%; height:100%; background-color:transparent;">
    <iframe src="http://www.randomwebsite.com" frameborder="0;" scrolling="no"; style="width:100%; height:100%;" >
    </iframe>
  </div>
</body>
</html>