Print certain div / elements using window.print()

example.html

	<script>
		function printDiv(divID){
			var printContents = document.getElementById(divID).innerHTML;
			var originalContents = document.body.innerHTML;

			document.body.innerHTML = printContents;

			window.print();

			document.body.innerHTML = originalContents;

		}
	</script>
<h1> do not print this </h1>

<div id='printMe'>
  Print this only 
</div>

<button onclick="printDiv('printMe')">Print only the above div</button>