My subMenu hides in dynamically added Div in IE but Popups in Firefox


I am new to Css and I am doin this website wherein there is a sidemenu image
n by using imagemaps a popout submenu(also an image with imagemaps) appears (done using fireworks). Also i am adding content to a division dynamically using javascript . My problem is that the submenu appears good in firefox ,but wen it comes to IE the submenu comes within the div added dynamically.
can anybody please help.

Problem in IE

Screenshot in Firefox

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