bsw@211: function ui.box_col(args)
bsw@211:   local class = "col"
bsw@211:   if args.class then class = class .. " " .. args.class end
bsw@211:   if app.ui_box_col == 1 then class = class .. " first" end
bsw@211:   ui.container{ attr = { class = class }, content = args.content }
bsw@211:   app.ui_box_col = app.ui_box_col + 1
bsw@211: end