Assertion:
The use of block structures in MARQUEEs (such as BLOCKQUOTE)
will be ignored in IE versions 3.0x and below, while in IE 4.0 and above it makes
the marquee appear as a multi-line field.
Basic MARQUEE element, no width. Span nested inside:
filler text
filler text
Basic MARQUEE element, no width. Blockquote nested inside:
filler text
filler text