Get key pressed inside an input box

input-key.js

$('input#expectedIncome').keypress(function() {
				var e = window.event || e;
					var keyUnicode = e.charCode || e.keyCode;
					if (e !== undefined) {
						switch (keyUnicode) {
							case 13: break; // Enter
							case 16: break; // Shift
							case 17: break; // Ctrl
							case 18: break; // Alt
							case 27: this.value = ''; break; // Esc: clear entry
							case 35: break; // End
							case 36: break; // Home
							case 37: break; // cursor left
							case 38: break; // cursor up
							case 39: break; // cursor right
							case 40: break; // cursor down
							case 78: break; // N (Opera 9.63+ maps the "." from the number key section to the "N" key too!) (See: http://unixpapa.com/js/key.html search for ". Del")
							case 110: break; // . number block (Opera 9.63+ maps the "." from the number block to the "N" key (78) !!!)
							case 190: break; // .
//							default: $(this).formatCurrency({ colorize: true, negativeFormat: '-%s%n', roundToDecimalPlace: -1, eventOnDecimalsEntered: true });
						}
					}
			});