=================================== .vimrc
set incsearch
set ignorecase
set smartcase
set scrolloff=2
set wildmode=longest,list
help wildmode

-----------------------	reverse background for vim mapped to <F11>
place in .vimrc or source from .vimrc
works with vim and gvim

:function! ReverseBackground()
:   let Mysyn=&syntax
:   if &bg=="light"
:       se bg=dark
:   else
:       se bg=light
:   endif
:   syn on
:   exe "set syntax=" . Mysyn
:   echo "now syntax is "&syntax
:endfunction
:command! Invbg call ReverseBackground()
:noremap <F11> :Invbg<CR>