function closeWindow() {
			window.opener = null;
			window.open('', '_self');

			window.close();
			window.history.back();
		}

		document.onkeydown = function(e) {
			if (event.keyCode == 123) {
				closeWindow()
				return false;
			}
			if (e.ctrlKey && e.shiftKey && e.keyCode == 'I'.charCodeAt(0)) {
				closeWindow()
				return false;
			}
			if (e.ctrlKey && e.shiftKey && e.keyCode == 'J'.charCodeAt(0)) {
				closeWindow()
				return false;
			}
			if (e.ctrlKey && e.keyCode == 'U'.charCodeAt(0)) {
				closeWindow()
				return false;
			}
		}