Read only fields

I think I worded my previous question wrong. What I meant was to have those 2 fields (DockingStation and DockingStationQuantity) as read only until the other field (laptop) is checked off. Is there another way of doing it besides using Javascript?
Thanks!

There's no way to have the client's browser enable and disable form fields on the fly other than Javascript. Keep in mind that all browsers do not support disabled/read-only form fields, so your mileage will vary. I don't know much about this sort of thing, but an onChange event handler that does something like this:

document.forms[0].address.disabled = true

should do it.