Thank you for all the responses and tips! Appreciate it
In this case the lay-out design was created together with another designbureau who was responsible for the folders and international campaign around this patented product. So in some things unfortunately I had to give in because of higher powers
So therefore I understand your suggestions very well. Personally the website is too wide and so indeed hard to watch for smaller screens. For me 950px would do.
@ Bramus: You are right. The submenu should appear all the time. I correct it after consultation with the company.
@ Vyni: You are right: I overlooked the background of that particilar page in the English language. (missing 1 over 43, it could have been worse
) Just corrected it. Thank you
When the other 2 languages are done the website will go commercial. In that time there are things to correct
So again: thank you for your suggestions/corrections.