travel from Narita airport to sapporo

I am traveling to japan for the first time for my studies, and the university I have selected is in sapporo, now the airline of my country is only upto Narita from there I have to look for some other transport to go to Sapporo. Can anyone help me in telling that how can I get to Sapporo from Narita and as I am student so I would be grateful if it is cheap.

Fly Skymark from Tokyo Haneda.
http://www.skymark.co.jp/en/index.html

Beware of their check in baggage policy. (free up to 15kg) If your luggage weighs more than that, consider utilizing a courier service, or Takuhaibin.
http://www.japan-guide.com/e/e2278.html

From Narita to Haneda, take the limousine bus for 3,000 yen.
http://www.limousinebus.co.jp/en/timetable/narita/hanedaapt_...

There is a cheaper train service as well.
http://www.jorudan.co.jp/english/norikae/e-norikeyin.html

friend? If you have one Ana is cheap about 10000 yen for a one way trip but the only problem is that on the English web site its really really more expensive. Thats why if you have a Japaneses friend he or she could find you a good deal on the ANA Japaneses web site.