stop Event Bubbling

[orion_rus]

Hello world i town. If i mouseover it simple menu will be shown. In this menu i have some points. But if i have in the points area another town then i mouseover it, event bubbles and menu of another town has been shown. Is any ideas how i can prevent it?
Thanks in advance)

[Bernard Marx]

check these out:
IE event model: [msdn.microsoft.com ]

W3C event model: [mozilla.org ]

[orion_rus]

Thank you very much.