rule | NN n/a IE 4 DOM n/a
A rule object contains the combination of selector and style attribute/value pairs defined within a style sheet. While you can obtain the selector directly as a property, a script cannot quickly derive the style attributes or values assigned in the rule without iterating through all style attributes.
Object Model Reference
IE | document.all.styleSheetID.rules(i)

readOnly | NN n/a IE 4 DOM n/a
| Read-only
Whether the style sheet (and thus the rules therein) can be modified under script control. Style sheets imported through a LINK element or an @import rule cannot be modified, so they return a value of true.
Value Boolean value: true | false.
Default | false

selectorText | NN n/a IE 4 DOM n/a
| Read-only
Returns the selector defined for the rule.
Value String
Default | None.