 class Slideshow extends FileEditor
     constructor: (@editor, @filename, content, opts) ->
         opts = @opts = defaults opts,{}
-        @element = $("<div>Salvus slideshow not implemented yet.</div>")+        @element = $("<div>Salvus slideshow not implemented yet.</div>")

                if result
                    @set_resolution(result)
        else
            console.log('setting res to #{res}')
            try
                res = parseInt(res)
                if res < 150

                    opts.cb(output.stderr); return
                s = output.stdout
                i = s.indexOf('\nInput:')
                input = s.slice(i+7, s.indexOf('\n',i+3))

                # normalize path to be relative to project home
                j = input.indexOf('/./')
