[Solved] Complex RadComboBox

[Mohammad]

Dear all,
please help me in this case

i need radComboBox to display main categories
when click on any category,,, chek if it has sub categories or not
if exist,,,, display this sub in the same radComboBox (at the right of parent category)
also if one of sub category sas sub category,,,display the new sub as above

i see this example in
www.alibaba.com
if you login and use the message center....make new selling post or buying post and see how category specefied


i.e the categories as tree view syntax but i dont need tree view
like this i need,,,
Main category | Sub1 | Sub2 | Sub3.......
please help me,,,,