iframe auto resize from width

autoiframe.js

$(function() {

    // auto size iframe
    $('iframe[data-size]').each(function () {
      var frame = $(this);
      var size = frame.data('size').split('x');
      var rate = size[0]/size[1];

      frame.width(size[0]);
      frame.height(frame.width()/rate);

      this.contentWindow.addEventListener('resize', function(){
        frame.height(frame.width()/rate);
      });
    });

});

example.html

<iframe src="http://adOrSiteView.com/example" scrolling="no" data-size="728x90"></iframe>

master.css

iframe{
  border: none;
  overflow: hidden;
}