this the code i had used long back was in my notes, not sure where i had got from to provide the reference and credit :). Try this.
$(document).ready(function() {
$("#Empid").keydown(function (e) {
if ($.inArray(e.keyCode, [46, 8, 9, 27, 13, 110, 190]) !== -1 ||
(e.keyCode == 65 && e.ctrlKey === true) ||
(e.keyCode == 67 && e.ctrlKey === true) ||
(e.keyCode == 88 && e.ctrlKey === true) ||
(e.keyCode >= 35 && e.keyCode <= 39)) {
return;
}
if ((e.shiftKey || (e.keyCode < 48 || e.keyCode > 57)) && (e.keyCode < 96 || e.keyCode > 105)) {
e.preventDefault();
}
});
});
Hope this helps..
Hussain
Happy Coding.