Suggestion: Cascading options for other form designer elements

It would be nice in future versions to be able to use cascading IDs on more form designer elements than combo and list boxes. For example, it would be a nice feature to be able to have a text box only become fillable when a certain radio button is selected.

Example from a different application in which a mailing label salutation can only be specified when using the property address label type:

/customer/servlet/servlet.FileDownload?file=00P6000000e88OaEAI