Responsive iFrame js

RFrame.js

jQuery(document).ready(function( $ ){
  
  function responsiveFrame() {
    $( 'iframe' ).each(function(){
      var fh = $( this ).height();
      var fw = $( this ).width();
      var fp = $( this ).parent().width();
      var fpw = fp/fw;
      var fpwh = Math.round( fh*fpw );
      $( this ).css({
        'width': fp,
        'height': fpwh,
      });
    });
  }
  
  responsiveFrame();
  
  $(window).resize(function(){
     responsiveFrame();
  });
  
  var watch_body = $( 'body' );
  var body_height = watch_body.innerHeight();
  
  window.setInternal(function(){
    var new_height = watch_body.innerHeight();
    if ( new_height != body_height ) {
      body_height = new_height;
      responsiveFrame();
    }
  }, 200);
  
});