May 2006
Intermediate to advanced
104 pages
2h 50m
English
The character references numbered 130 through 159 are not defined in HTML and therefore are invalid characters that should be avoided.
Some nonstandard numerical entities in this range are supported
by browsers (such as &151; for
an em dash); however, they all have standard equivalents (listed in
the General Punctuation section). If you need an em
dash, use &8212; or — instead.
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