Good:
<A HREF="http://metalab.unc.edu/xml/">
<DIV ALIGN="CENTER">
<A HREF="http://metalab.unc.edu/xml/">
<EMBED SRC="minnesotaswale.aif" hidden="true">
Bad:
<A HREF=http://metalab.unc.edu/xml/>
<DIV ALIGN=CENTER>
<EMBED SRC=minnesotaswale.aif hidden=true>
<EMBED SRC="minnesotaswale.aif" hidden>