How do I get "Height=100%" working on an embed code in the Instructions field for Assignments?

Jeremy.Virgo71

 

Specifically, in the Instructions field for Assignments.

 

It gives me a tiny height viewport, but the "Width" tag appears to work.

 

If I manually set the height, to say, 1500px, it works fine, but I'd like it to do it automatically, in case the content changes later.

 

Code Example:

<object type="text/html" height="100%" width="100%" data="http://www.colorado.edu"> </object>