[danik.js]

<div id="div" style="border:1px solid"></div>
<script data-target="#div">
(function(){
	var script = document.scripts[document.scripts.length - 1];
	var target = document.querySelector(script.getAttribute('data-target'));

	var frameId = 'frameDownload';
	var frame = document.getElementById(frameId);
	if (!frame) {
		frame = document.createElement('iframe');
		frame.id = frameId;
		//frame.style.display = 'none';
		target.appendChild(frame);
	}
	frame.src = '//javascript.ru';
})()
</script>