Verify longdesc, name, width, and height attributes for IFRAME element
Test for assertions 16.5-1, 16.5-2, 16.5-3, and 16.5-4

This is some text. This is some text. This is some text. This is some text. This is some text. This is some text. This is some text. This is some text. This is some text. This is some text. This is some text. This is some text. This is some text. This is some text. This is some text. This is some text.