var ak_js = document.getElementById( "ak_js" );

if ( ! ak_js ) {
	ak_js = document.createElement( 'input' );
	ak_js.setAttribute( 'id', 'ak_js' );
	ak_js.setAttribute( 'name', 'ak_js' );
	ak_js.setAttribute( 'type', 'hidden' );
}
else {
	ak_js.parentNode.removeChild( ak_js );
}

ak_js.setAttribute( 'value', ( new Date() ).getTime() );

var commentForm = document.getElementById( 'commentform' );

if ( commentForm ) {
	commentForm.appendChild( ak_js );
}
else {
	var replyRowContainer = document.getElementById( 'replyrow' );

	if ( replyRowContainer ) {
		var children = replyRowContainer.getElementsByTagName( 'td' );

		if ( children.length > 0 ) {
			children[0].appendChild( ak_js );
		}
	}
}

/*
playback timings (ms):
  LoadShardBlock: 56.795 (3)
  esindex: 0.007
  captures_list: 76.936
  CDXLines.iter: 15.094 (3)
  PetaboxLoader3.datanode: 55.435 (4)
  exclusion.robots.fetch: 0.203 (4)
  exclusion.robots: 0.638
  exclusion.robots.policy: 0.257
  RedisCDXSource: 1.979
  PetaboxLoader3.resolve: 45.462 (3)
  load_resource: 60.275
*/