input[type="text"].inactive,
input[type="password"].inactive,
select.inactive,
textarea.inactive,
select option.inactive,
select.inactive option.inactive
{
    color: #999;
    font-style: italic;
}

select.inactive option
{
    color: #000;
    font-style: normal;
}

input[type="text"].invalid,
input[type="password"].invalid,
select.invalid,
textarea.invalid
{
    border: 1px solid red;
}