A man in his 20s is in critical condition after he darted across Ala Moana Boulevard at Kamakee Street just before 11 last night and was struck by a Waikiki trolley. Police say the man was crossing in the mauka direction against the light when he was struck by a trolley traveling westbound on Ala Moana Boulevard.  He was transported to a trauma center in critical condition.  Police say speed and alcohol were not factors on the part of the trolley driver, who was not injured. They aren't sure whether the pedestrian had been drinking prior to crossing the street.