Create Numeric Text box using JavaScript

We can create numeric textbox using JavaScript, below code will create numeric text using JavaScript.

<script language="javascript" type="text/javascript">

//Numeric textbox

    function isNumberKey(evt) {

        var charCode = (evt.which) ? evt.which : event.keyCode

        if (charCode > 31 && (charCode < 48 || charCode > 57))

            return false;

        return true;

    }

</script>

<input type="text" runat="server" onkeypress="return isNumberKey(event)" id="txtNumeric"/>

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