update the style of any componennt via ajax (initially works) setting e.g. a background image:
the resulting div only receives the url('https part of the image url
the full url in for the background image
The jq.parseStyle() method can be tested in isolation, causing the parsing error.
The css is parsed into key value pairs splitting the string by ';' and ':'
call invalidate() to re-render the whole div (like initial rendering)