I'll try with the detection.
But where should I place it?
In the Html under the body tag or somewhere in the css?
And about the errors, those images doesn't need to be shown on the website, so it's fine. Unless of course if that has anything to do with it not beeing able to be centered.
But I don't think that why.
ok got it to work afterall :)
It says the width is 1600, so it should center according to that right?
Found the problem.
I had to put a width and marging auto on my main.
Thank's alot for all your help :)