[print] 화면 프린트 출력하기

   function contentPrint() {
    var initBody = document.body.innerHTML;

	if (window.matchMedia) {
		var mediaQueryList = window.matchMedia('print');
		mediaQueryList.addListener(function (mql) {
			if (mql.matches) {
				document.body.innerHTML = document.getElementById(contentArea).innerHTML;
			} else {
				document.body.innerHTML = initBody;
			}
		});
	}

	window.onbeforeprint = function () {
		document.body.innerHTML = document.getElementById(contentArea).innerHTML;
	}
	window.onafterprint = function () {
		document.body.innerHTML = initBody;
	}

	window.print();
}