No preamble needed…

Readonly:

*[readonly] {
/* CSS for all nodes with readonly attribute */
}

input[readonly] {
/* CSS for input nodes with readonly attribute */
}

textarea[readonly] {
/* CSS for textarea nodes with readonly attribute */
}

select[readonly] {
/* CSS for select nodes with readonly attribute */
}

Disabled:

*[disabled] {
/* CSS for all nodes with disabled attribute */
}

input[disabled] {
/* CSS for input nodes with disabled attribute */
}

textarea[disabled] {
/* CSS for textarea nodes with disabled attribute */
}

select[disabled] {
/* CSS for select nodes with disabled attribute */
}

Notes:
Works with:
readonly=”[anything]”
readonly
disabled=”[anything]”
disabled

Steven