Accept Only Numbers

by narensrinivasans

HTML

<INPUT id="txtChar" maxlength="10" autocomplete="off" onkeypress="return isNumberKey(event)" type="text" name="txtChar">
    
    <script language="Javascript">
    function isNumberKey(evt)
      {
         var charCode = (evt.which) ? evt.which : event.keyCode
         if (charCode > 31 && (charCode < 48 || charCode > 57))
            return false;

         return true;
      }
</script>