[oXygen-user] oxy_eval?

Just wondering if there's an "eval" custom CSS function .. ? I've got an oxy_combobox that lists a number of attributes, and would like to be able to test the selected value. If a certain attribute was selected, I want to set another attribute on the same element. I know I can do this by writing some Java code, but wanted to make sure I wasn't missing something obvious with the custom CSS functions. Thanks! ...scott