What I would like to do: Based on the value of an input-checkbox (an attr) I want to hide or make visible a input-text field (also an attr). --- This is easy if i have access to javascript & DOM(Which we don't) --- its easy in css to style a field based on some element value .class[value="xyz"] {} (but this wont work as i want to change field b's css "display:block/none" attribute based on field a's value (a checkbox) ) What is the simplest way of doing this on a sheet? Thanks !