应该是不占用名额．

ｕｓｃｉｓ　官方网站的信息。
http://www.uscis.gov/files/nativedocuments/H1B_FY05_Characteristics.pdf


请看第四页的第二段：
When the H-1B category was enacted in 1990, Congress established that a maximum of 65,000 H-1B visas may be issued to aliens during each fiscal year. This limitation, commonly referred to as the"H-1B cap", does not apply to H-1B petitions filed on behalf of aliens who have been counted against the cap in the previous six years and who have not been outside of the United States for one year or longer. Thus, generally, petitions to extend an H-1B nonimmigrant's period of stay, change the conditions of the H-1B nonimmigrant's current employemnt, or request new H-1B employment filed on behalf of H-1B workers already in the United States will not count against the H-1B fiscal year cap.