Using Multiple Timelines in a Web Page
Create a new timeline either by right-clicking in the Timelines panel and selecting the Add Timeline command or selecting the Add Timeline command from the Timeline submenu of the Modify menu. Move among different timelines in a Web page by selecting them from the Timeline drop-down menu in the Timelines panel. You can delete a timeline with the Remove Timeline command.
After you create a second timeline, you need to trigger it. You can select the Autoplay check box to trigger the second timeline along with the first one. You can also trigger the second timeline by attaching the Play Timeline behavior to a generic button. You can also trigger a timeline to play immediately after another timeline by inserting the Play Timeline behavior into the last frame's B channel in the first timeline.