function num_check(e)
{
  var charCode = (navigator.appName == "Netscape") ? e.which : e.keyCode
  if ((charCode < 48 || charCode > 57) && (charCode < 13 || charCode > 13))
  {
    alert("Please enter only Numerics Values(0-9)")
    return false
  }
  return true
}