$(document).ready
( function()
  { var headers = $("#content > h1")
  ; if ( headers.length < 3 ) return false
  ; headers.css("cursor", "pointer")
  ; var hi = -1 , h , s , arr
  ; while( h = headers[++hi] )
    { s = h , arr = []
    ; while ( s = s.nextSibling )
      { if ( s.tagName == 'H1' ) break
      ; arr.push( s )
      }
    ; if ( !arr.length ) break
    ; $(arr).wrapAll('<div class="chapter" style="display: none; border: 1px solid white;"></div>')
    }
  ; headers.click
    ( function()
      { $(this.nextSibling).slideToggle()
      }
    )
  }
)