Does Opera support multiple windows?
No, Opera 3.62 for EPOC cannot do this so any links using the target attribute to open a new window will instead open the page in the current (and only) window. Using the back button will reload the previous page. The lack of multiple windows also affects Javascript support with new window functions being ignored. This can cause problems for certain links as explained here.
Yes, you can open as many new windows as memory will allow for, and popup windows/adverts triggered by Javascript will also appear in Opera 5. Unlike Opera for desktop Operating Systems, the Symbian version does not display open windows simultaneously. Instead, each window is viewed individually and cannot be rezised or floated. This may lead to some popups looking a little strange since all windows are displayed in full screen. To allow navigation between windows, a new menu option will dynamically appear at the bottom of the Windows menu for each window currently open. Each option will display the title or URL of the document being displayed in that window. Note that in the ER6 edition of Opera 6 for the Nokia 9210i Comminicator, a maximum of two windows may be open at any one time.