How to centralize a banner

[financehubs]

I am using an Amazon banner, <iframe ...> </iframe> for top below navbar area, but it always shows on the left side of the area.

I am thinking inserting <tr align="center"></tr> within the <iframe></iframe>, but it doesn't work.

Also, is it possible to place a Google banner and Amazon banner side by side (e.g. 468x60 + 468x60). Any reference how to do it if I have codes for both banners?

Thanks.

[OurCouponHome]

I add this to the beginning...Hope it helps. I am also looking how to do them side by side.

<div style="text-align:center; id="ad_global_below_navbar">