[j0hnik]

<div class="el">1</div>
	<div class="el">3</div>
	<div class="el">4</div>
	<div class="el">5</div>
	<div class="el">6</div>
	<script>

		var div = document.querySelectorAll('div'),x;
		div.forEach(el => el.onmouseenter = e =>{
			console.log(el,x);
			x=el;
		} );

	</script>