Print de un elemento específico

gistfile1.txt

$('#print').on("click", function () {
	printVoucher()
});

function printVoucher(){
	var instructionVoucher = document.getElementById("paperTicketInstructions");
	var print = window;
	print.document.write(instructionVoucher.innerHTML);
	// print.document.close();
	// print.focus();
	print.print();
	// print.close();	
}