some pages not responsive?

Hi,'
I saw that some of my pages are not responsive:
see http://hochzeitsautomieten.kever-events.nl/index.php/de/#menu

I self I assume the problem is caused by fixed pixel with of the tables used to place pictures and text in 3 (invisible) boxe?

as anyone an alternative?

Sadly - the tables ruins RWD. To solve that you would need to implement responsive tables:
http://css-tricks.com/responsive-data-tables/
but its not an easy thing to do if you don't know html and css well.