html - Combining two CSS elements -

how combined follow 1 block

#idone td, th {   ...... }  #idtwo td, th {   ...... } 

i tried

#idone td, th, #idtwo td, th {   ..... } 

but theth included own.

any ideas? thanks

you need specify parent each of td , th tags:

#idone td, #idone  th, #idtwo td, #idtwo th {   ...... }