function checkEnter(e, f)
{ 
	var characterCode

	if( e && e.which )
	{
		e = e
		characterCode = e.which
	} else {
		e = event
		characterCode = e.keyCode
	}

	if ( characterCode == 13 ) 
	{
		if ( f=="fLogin" ) document.fLogin.submit();
		else if ( f=="form_login1" ) document.form_login1.submit();
		else if ( f=="form_login2" ) document.form_login2.submit();
		else if ( f=="form_login3" ) document.form_login3.submit();
		
	} else {
		return true;
	}
}