Responsive iFrames - 1

by Darth Vader

HTML

<div class="wrapper">
    <div class="h_iframe">
        <img class="ratio" src="http://placehold.it/16x9"/>
        <iframe src="http://kw.my/chemmedia/springer-responsive-course/" frameborder="0" allowfullscreen></iframe>
    </div>
</div>

CSS

html,body        {height:100%;}
.wrapper         {width:80%;height:100%;margin:0 auto;background:#CCC}
.h_iframe        {position:relative;}
.h_iframe .ratio {display:block;width:100%;height:auto;}
.h_iframe iframe {position:absolute;top:0;left:0;width:100%; height:100%;}