function login()
{
	if(document.loginform.User_Name.value == "" || document.loginform.User_Name.value)
	{
		alert("ID and password are incorrect");
		return false;
	}

	if(document.loginform.field-user.value == "" || document.loginform.field-user.value)
	{
		alert("ID and password are incorrect");
		return false;
	}
}