function getkey(e)
{
  var code;
  
  if( ! e )
  {
  	var e = window.event;
  }

  if( e.keyCode ) 
  {
  	code = e.keyCode;
  }
  else
  {
  	if( e.which ) code = e.which;
  }

  return code;
}

function numeric(eX)
{
  var ret = false;
  
  test = getkey(eX);
  if( test >= 48 && test <= 57 ) ret = true;
  if( test == 9 || test == 8 || test == 13 || test == 37 || test == 39 || test == 46 ) ret = true;
  
  return ret;
}