$("#extendMinutes").keydown(function (event) {            var event = event || window.event;            if (event.keyCode == 13)                event.keyCode = 9;            if ((event.keyCode < 48 || event.keyCode > 57) && event.keyCode != 8 && event.keyCode != 46 && (event.keyCode < 96 || event.keyCode > 105)) {                event.preventDefault();                event.returnValue = false;            }        });