This was the developer note attached with the script and i dont understand it.
Developer's Note
The "drop-in" effect for this script is archived by setting the outermost DIV to overflow:hidden (supported by both IE4+ and NS6+). This CSS attribute causes contained content that venture outside the DIV to be clipped, allowing for the illusion of content appearing from an "edge".
http://dynamicdrive.com/dynamicindex14/dropitslide.htm
I found the solution
I used <p align="left"> instead of < div align="centre"> and it works well on both the browsers now.
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