XDOC updates for IE and Safari compatibility.

git-svn-id: http://acl2-books.googlecode.com/svn/branches/jared@2130 303c5b2c-9740-0410-b014-fd8f9db7be32
horrible fix for horrible problem

git-svn-id: http://acl2-books.googlecode.com/svn/branches/jared@2131 303c5b2c-9740-0410-b014-fd8f9db7be32