can i stay overnight at the airport AMS in amsterdam?

i just checked my ticket and i arrive friday morning and leave saturday afternoon. can i check in friday morning?

there are a couple of Hotels almost attached to the airport, like the IBIS and many more...

just have a look at the link below.

Yes, you can stay overnight.

http://www.sleepinginairports.net/

But if you got Schengen visa or do not need Schengen visa it would be better to spent a day in Amsterdam and sleep in a hostel or hotel.

http://www.hostelworld.com/
http://en.wikipedia.org/wiki/Schengen_Agreement

Check in time at almost every hotel is 3pm so keep that in mind. When i arrived in Amsterdam early morning, i took NS train straight to the city so i could hang out there until my check in time.
To stay at any hotel, you will have to go through passport control.
Also, you questions makes it sound like you were asking if you could actually stay overnight inside the airport. Sure! I did that in Istanbul. Nobody will bother you as long as you don't lay out on the floor.