Read an extremely interesting article on : http://www.ewtn.com/library/mary/olislam.htm
But i shall only write the part which i found most interesting!
In the Most revered Holy Book of the Islam faith, the Qur’an, the Holy name of the Blessed Virgin Mary is mentioned no lesser than 30 times. No other woman’s name is mentioned. Among men, only Abraham, Moses and Noah’s name is mentioned more than the Virgin. In the Qur’an, Mary is described as “Virgin, ever Virgin”. The Islamic belief in the virginity of Mary puts to shame the heretical beliefs of those who call themselves Christian, while denying the perpetual virginity of Mary.