I'm constantly amazed when I check my blog stats at how popular an old article I wrote on using Object tags as a replacement for an Iframe has become.  This is obviously an area that people are having trouble finding information, so here is a good starting place to find your solution:

First, my original posting - Alternative to < iframe />

And here are two examples, courtesy of W3C, on IFrame versus Object tag:

The basic IFrame example:

  <IFRAME src="foo.html" width=400 height=500>
  that unfortunately your user agent doesn't support. Alternatively you
  can get the related document <a href="foo.html">here</a>.
  </IFRAME>

  <OBJECT data="foo.html" width=400 height=500>
  that unfortunately your user agent doesn't support. Alternatively you
  can get the related document <a href="foo.html">here</a>.
  </OBJECT>

And the more complex example:

  <IFRAME src="foo.html" width=400 height=500 scrolling=auto
     frameborder=1>
  that unfortunately your user agent doesn't support. Alternatively you
  can get the related document <a href="foo.html">here</a>.
  </IFRAME>

<OBJECT src="foo.html" width=400 height=500>
  <PARAME name=scrolling value=auto>
  <PARAME name=frameborder value=1>
  that unfortunately your user agent doesn't support. Alternatively you
  can get the related document <a href="foo.html">here</a>.
  </OBJECT>

You can visit the W3 Frames page, and find IFRAME vs OBJECT about 2/3rds of the way down the document.  (It's slightly slanted in favor of IFrame and doesn't explain a lot of the security issues around using IFrame in IE.)

http://www.w3.org/TR/WD-frames-970331