<input type="text" value="disabled" disabled />
<br/>
<input type="text" value="disabledAndReadonly" disabled readonly />
<br/>
<input type="text" value="readonly" readonly />
<br/>
<input type="text" value="modify me" />
<br/>
<p contenteditable="true">Content editable paragraph</p>

/* Standard Level 4 selectors */
:read-write {
  background-color: lightyellow;
}

:read-only {
  background-color: lightgray;
}

/* Level 4 selectors for Firefox */
:-moz-read-write {
  background-color: lightyellow;
}

:-moz-read-only {
  background-color: lightgray;
}