อยากได้โค้ดตรวจสอบการรับค่า Textbox ให้รับค่าเฉพาะตัวเลข (web form)

<script>
	function inputNumberFunction(ctrl) {

	    $(ctrl).keydown(function (event) {
		// Allow:  delete, tab, enter and . - , f5 

		if ($.inArray(event.keyCode, [8, 9, 27, 13, 46, 109, 110, 190, 189, 116]) !== -1 ||
		// Allow: Ctrl+A

		    (event.keyCode == 65 && event.ctrlKey === true) ||
		// Allow: home, end, left, right
		    (event.keyCode >= 35 && event.keyCode <= 39)) {
		    // let it happen, don't do anything
		    return;
		}
		else {
		    // Ensure that it is a number and stop the keypress
		    if (event.shiftKey || (event.keyCode < 48 || event.keyCode > 57) && (event.keyCode < 96 || event.keyCode > 105)) {
			event.preventDefault();
		    }
		}
	    });

	}
</script>

inputNumberFunction("#<%= txtInput.ClientID %>");